Question 1

A 100 g glass container is at 10.0$^{\circ}$C.200 g of water at 90.0$^{\circ}$C is added to the glass container.What is the final temperature of the water and the glass,in $^{\circ}$C? (specific heat of water = 1.00 cal/g $^{\circ}$C,specific heat of glass = .200 cal/gm$^{\circ}$C)&#10;A) 82.7&#10;B) 75.0&#10;C) 68.2&#10;D) 50.2&#10;E) 46.9

Accepted Answer

Explanation:Heat lost by water = m_wC_w(T_i - T_f) = 200 g * 1 cal/g ^$\circ$C * (90.0^$\circ$C - T_f) = 20000 cal - 200 T_f calHeat gained by glass = m_gC_g(T_f - T_i) = 100 g * 0.2 cal/g ^$\circ$C * (T_f - 10.0^$\circ$C) = 20 T_f cal - 200 calHeat lost by water = Heat gained by glass20000 cal - 200 T_f cal = 20 T_f cal - 200 cal20200 cal = 220 T_f calT_f = 20200 cal / 220 calT_f = 91.8^$\circ$C

Question 2

A 50.0 g glass container contains 200 g of water at 20.0 $^{\circ}$ C.A 20.0 g piece of an alloy at 100 $^{\circ}$ C is added to the water in the container.The final temperature of the mixture is 24 $^{\circ}$ C.What is the specific heat of the alloy in cal/gm $^{\circ}$ C? (specific heat of water = 1.00 cal/gm $^{\circ}$ C,specific heat of glass = 0.200 cal/gm $^{\circ}$ C)

A) 2.75
B) 1.87
C) 1.54
D) 0.852
E) 0.553

Accepted Answer

The heat lost by the alloy equals the heat gained by the water and the glass. Using the formula $m \cdot c \cdot \Delta T$, solve for the specific heat of the alloy.

Question 3

What is the total internal energy of 2.00 moles of an ideal gas at -50$^{\circ}$C?&#10;A) 4,040 J&#10;B) 4,750 J&#10;C) 5,020 J&#10;D) 5,560 J&#10;E) 6,030 J

Accepted Answer

5,560 J&#10;

Question 4

A 100 gram glass container contains 200 grams of water at 10 $^{\circ}$ C.A 200 gram piece of lead at 150 $^{\circ}$ C is added to the water in the container.What is the final temperature of the system? (specific heat of water = 4,186 J/kg $^{\circ}$ C,specific heat of glass = 837.2 J/km $^{\circ}$ C,specific heat of lead = 127.7 J/km $^{\circ}$ C)

A) 12

^{\circ}

C
B) 14

^{\circ}

C
C) 23

^{\circ}

C
D) 31

^{\circ}

C
E) 37

^{\circ}

C

Accepted Answer

The answer of A 100 gram glass container contains 200...

Question 5

A 100 gram glass container contains 250 grams of water at 15.0 $^{\circ}$ C.A 200 gram piece of lead at 100 $^{\circ}$ C is added to the water in the container.What is the final temperature of the system? (specific heat of water = 4,186 J/kg $^{\circ}$ C,specific heat of glass = 837.2 J/km $^{\circ}$ C,specific heat of lead = 127.7 J/km $^{\circ}$ C)

A) 37

^{\circ}

C
B) 31

^{\circ}

C
C) 23

^{\circ}

C
D) 17

^{\circ}

C
E) 12

^{\circ}

C

Accepted Answer

The answer of A 100 gram glass container contains 250...

Question 6

A 100 gram aluminum container is at 15.0 $^{\circ}$ C.150 grams of water at 80.0 $^{\circ}$ C is added to the aluminum container.What is the final temperature of the water and the aluminum? (specific heat of water = 1.00 cal/g $^{\circ}$ C,specific heat of aluminum = 0.215 cal/gm $^{\circ}$ C)

A) 58.3

^{\circ}

C
B) 63.6

^{\circ}

C
C) 68.5

^{\circ}

C
D) 73.1

^{\circ}

C
E) 83.3

^{\circ}

C

Accepted Answer

First, we need to calculate the heat lost by the aluminum container and the heat gained by water:

Q(aluminum) = m(aluminum) * C(aluminum) * ΔT
Q(water) = m(water) * C(water) * ΔT

Where m is the mass, C is the specific heat, and ΔT is the change in temperature.

The heat lost by the aluminum container is equal to the heat gained by the water, so:

Q(aluminum) = -Q(water)

m(aluminum) * C(aluminum) * ΔT = -m(water) * C(water) * ΔT

Solving for ΔT:

ΔT = -m(water) * C(water) * ΔT / (m(aluminum) * C(aluminum) )

Substituting the values:

ΔT = -150 g * 1.00 cal/g °F * (80.0 °F - T) / (100 g * 0.215 cal/gm °F)

where T is the final temperature of both the water and the aluminum container.

Solving for T:

T = 68.5 °F

Therefore, the final temperature of both the water and the aluminum container is 68.5°F. The answer is choice C.

Question 7

If the temperature of 2.000 moles of an ideal gas is increased by 50$^{\circ}$ C,then what is the increase in the total internal energy?&#10;A) 1,247 J&#10;B) 1,980 J&#10;C) 2,250 J&#10;D) 2,750 J&#10;E) 3,030 J

Accepted Answer

The correct answer is A.The increase in internal energy is given by:$$\Delta U = nC_v\Delta T$$where:* n is the number of moles of gas* $C_v$ is the molar specific heat at constant volume* $\Delta T$ is the change in temperatureFor an ideal gas, $C_v = (3/2)R$, where R is the ideal gas constant.Substituting these values into the equation, we get:$$\Delta U = n(3/2)R\Delta T$$$$\Delta U = (2.000 	ext{ mol})(3/2)(8.314 	ext{ J/mol K})(50 	ext{ K})$$$$\Delta U = 1,247 	ext{ J}$$

Question 8

Water falls a distance of 50.0 meters.The specific heat of water is 1.00 cal/gm$^{\circ}$C.What is the increase in temperature of the water after the fall,in$^{\circ}$C?&#10;A) 0.12&#10;B) 1.03&#10;C) 2.65&#10;D) 5.33&#10;E) 7.50

Accepted Answer

The potential energy lost by the water is converted into heat energy, which increases the temperature. Using the formula mgh = mcΔT, where g = 9.8 m/s², h = 50 m, and specific heat = 1 cal/g°C = 4.18 J/g°C, we find ΔT = gh/c = (9.8 * 50) / 4.18 ≈ 0.12°C.

Question 9

200 Joules of heat flows into a 35 g sample.If the temperature increases by 10$^{\circ}$C,then what is the heat capacity of the sample,in J/ $^{\circ}$C?&#10;A) 8.0&#10;B) 12&#10;C) 16&#10;D) 20&#10;E) 32

Accepted Answer

The heat capacity is calculated by dividing the heat added by the change in temperature: 200 J / 10°C = 20 J/°C.

Question 10

A 100 g glass container contains 250 g of water at 15.0 $^{\circ}$ C.A 100 g piece of unknown material at 100 $^{\circ}$ C is added to the water in the container.The final temperature of the mixture is 19.0 $^{\circ}$ C.What is the specific heat of the unknown material in J/kg $^{\circ}$ C? (specific heat of water = 4186 J/kg $^{\circ}$ C, specific heat of glass = 837.2 J/kg $^{\circ}$ C)

A) 245
B) 387
C) 412
D) 558
E) 674

Accepted Answer

The answer of A 100 g glass container contains 250...

Question 11

Which of the following is NOT included in the internal energy of a system?&#10;A) the kinetic energy of the center of mass&#10;B) the kinetic energy of the individual particles&#10;C) the spring potential energy of the individual particles&#10;D) the chemical energy of the individual particles&#10;E) the nuclear energy of the individual particles

Accepted Answer

The answer of Which of the following is NOT included...

Question 12

What is the heat needed to heat 150 g of water from 10.0$^{\circ}$C to 100$^{\circ}$C? (specific heat of water = 4186 J/kg $^{\circ}$C)&#10;A) 37.2 kJ&#10;B) 44.6 kJ&#10;C) 56.5 kJ&#10;D) 68.2 kJ&#10;E) 75.1 kJ

Accepted Answer

The answer of What is the heat needed to heat...

Question 13

What is the total internal energy of 2.00 moles of an ideal gas at 100 K?&#10;A) 3,670 J&#10;B) 3,250 J&#10;C) 2,750 J&#10;D) 2,490 J&#10;E) 1,950 J

Accepted Answer

The answer of What is the total internal energy of...

Question 14

A 100 g glass container contains 250 g of water at 15.0 $^{\circ}$ C. A 20.0 g piece of lead at 100 $^{\circ}$ C is added to the water in the container. What is the final temperature of the system in $^{\circ}$ C? (specific heat of water = 1.00 cal/g $^{\circ}$ C,specific heat of glass = 0.200 cal/g $^{\circ}$ C,specific heat of lead = 0.0310 cal/gm $^{\circ}$ C)

A) 10.1
B) 15.2
C) 25.0
D) 31.4
E) 46.3

Accepted Answer

The answer of A 100 g glass container contains 250...

Question 15

200 Joules of heat flows into a 35.0 g sample.If the temperature increases by 10.0$^{\circ}$C,then what is the specific heat capacity of the sample,in J/kg$^{\circ}$C?&#10;A) 175&#10;B) 254&#10;C) 375&#10;D) 422&#10;E) 571

Accepted Answer

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Question 16

To use 100 Calories of energy,how high would an 80.0 kg person have to climb?&#10;A) 104 m&#10;B) 298 m&#10;C) 323 m&#10;D) 486 m&#10;E) 534 m

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The answer of To use 100 Calories of energy,how high...

Question 17

What is the total internal energy of 1.00 mole of an ideal gas at 100$^{\circ}$C?&#10;A) 5,230 J&#10;B) 4,650 J&#10;C) 4,040 J&#10;D) 3,950 J&#10;E) 3,750 J

Accepted Answer

The answer of What is the total internal energy of...

Question 18

An exerciser lifts 10.00 N weights a vertical distance of 50.00 cm.How many times would the exerciser have to lift the weight to use 10.00 Calories of energy?&#10;A) 7,503&#10;B) 4,125&#10;C) 5,170&#10;D) 8,370&#10;E) 9,670

Accepted Answer

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Question 19

Water has a specific heat capacity of 4186 J/kg $^{\circ}$ C.A tank contains 500 kg of water at 10.0 $^{\circ}$ C.The water is heated up to a temperature of 90.0 $^{\circ}$ C.If electricity costs $0.100 per kilowatt-hour,then what is the cost of heating the water?

A) $8.75
B) $6.22
C) $4.65
D) $3.79
E) $3.10

Accepted Answer

The answer of Water has a specific heat capacity of...

Question 20

An exerciser of mass 90.0 kg walks up a flight of stairs that are 12.0 meter high.What is the energy of the exercise in Calories?&#10;A) 8.55&#10;B) 7.32&#10;C) 4.66&#10;D) 2.53&#10;E) 1.85

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Question 21

The specific of ice is 2.10 kJ/kg $^{\circ}$ C,the heat of fusion for ice at 0 $^{\circ}$ C is 333.7 kJ/kg,the specific heat of water 4.186 kJ/kg $^{\circ}$ C,and the heat of vaporization of water at 100 $^{\circ}$ C is 2256 kJ/kg.What is the final equilibrium temperature when 10.0 grams of ice at -15.0 $^{\circ}$ C is mixed with 3.00 grams of steam at 100 $^{\circ}$ C?

A) 60.2

^{\circ}

C
B) 65.0

^{\circ}

C
C) 70.2

^{\circ}

C
D) 76.4

^{\circ}

C
E) 80.3

^{\circ}

C

Accepted Answer

The answer of The specific of ice is 2.10 kJ/kg...

Question 22

The heat of fusion for ice at 0$^{\circ}$C is 333.7 kJ/kg.What is the energy needed to melt 100 grams of ice at 0.00$^{\circ}$C?&#10;A) 39.4 kJ&#10;B) 12.7 kJ&#10;C) 17.5 kJ&#10;D) 25.5 kJ&#10;E) 33.4 kJ

Accepted Answer

The answer of The heat of fusion for ice at...

Question 23

A 2000 kg car is traveling at 20.0 m/s and then puts on the brakes and comes to a complete stop.The heat generated at the brakes due to stopping heats up the brakes.The mass of the brake system is 20.0 kg and it has a specific heat of 0.200 kcal/kg $^{\circ}$ C.What is the increase in the temperature of the brakes?

A) 75.3

^{\circ}

C
B) 53.1

^{\circ}

C
C) 23.9

^{\circ}

C
D) 18.9

^{\circ}

C
E) 12.4

^{\circ}

C

Accepted Answer

The answer of A 2000 kg car is traveling at...

Question 24

A 2000 kg car is traveling at 40.0 m/s and then puts on the brakes and comes to a complete stop.The heat generated at the brakes due to stopping heats up the brakes.The mass of the brake system is 20.0 kg and it has a specific heat of 0.200 kcal/kg $^{\circ}$ C.What is the increase in the temperature of the brakes?

A) 66.6

^{\circ}

C
B) 75.4

^{\circ}

C
C) 87.5

^{\circ}

C
D) 95.6

^{\circ}

C
E) 117

^{\circ}

C

Accepted Answer

The answer of A 2000 kg car is traveling at...

Question 25

The specific heat of ice is 2.10 kJ/kg $^{\circ}$ C,the heat of fusion for ice at 0 $^{\circ}$ C is 333.7 kJ/kg,the specific heat of water 4.186 kJ/kg $^{\circ}$ C,and the heat of vaporization of water at 100 $^{\circ}$ C is 2,256 kJ/ kg.What is the final equilibrium temperature when 30.0 grams of ice at -15.0 $^{\circ}$ C is mixed with 8.00 grams of steam at 100 $^{\circ}$ C?

A) 65.6

^{\circ}

C
B) 60.2

^{\circ}

C
C) 56.2

^{\circ}

C
D) 50.1

^{\circ}

C
E) 45.2

^{\circ}

C

Accepted Answer

The answer of The specific heat of ice is 2.10...

Question 26

A sample of helium has a volume of 2.00 liters,a temperature of 20.0 $^{\circ}$ C,and a pressure of 2.50 atmospheres.What is the energy needed to heat the sample of helium gas from 20.0 $^{\circ}$ C to 95.0 $^{\circ}$ C at constant volume?

A) 88.0 J
B) 137 J
C) 175 J
D) 207 J
E) 476 J

Accepted Answer

The answer of A sample of helium has a volume...

Question 27

The specific of ice is 2.10 kJ/kg $^{\circ}$ C,the heat of fusion for ice at 0 $^{\circ}$ C is 333.7 kJ/kg,the specific heat of water 4.186 kJ/kg $^{\circ}$ C,and the heat of vaporization of water at 100 $^{\circ}$ C is 2,256 kJ/kg.What is the final equilibrium temperature when 10.0 grams of ice at -15 $^{\circ}$ C is mixed with 40.0 grams of water at 75 $^{\circ}$ C?

A) 59.5

^{\circ}

C
B) 57.2

^{\circ}

C
C) 53.6

^{\circ}

C
D) 48.9

^{\circ}

C
E) 42.6

^{\circ}

C

Accepted Answer

The answer of The specific of ice is 2.10 kJ/kg...

Question 28

The heat of fusion for lead at 327$^{\circ}$C is 22.9 kJ/kg and the specific heat of solid lead is 0.130 kJ/kg$^{\circ}$C,the specific of liquid lead is 0.0900 kJ/kg$^{\circ}$C,and the heat of vaporization of lead at 1,620$^{\circ}$C is 871 kJ/kg.What is the energy needed to vaporize 100 grams of lead starting at 0$^{\circ}$C?&#10;A) 105 kJ&#10;B) 189 kJ&#10;C) 176 kJ&#10;D) 156 kJ&#10;E) 147 kJ

Accepted Answer

The answer of The heat of fusion for lead at...

Question 29

The specific of ice is 2.10 kJ/kg $^{\circ}$ C,the heat of fusion for ice at 0 $^{\circ}$ C is 333.7 kJ/kg,the specific heat of water 4.186 kJ/kg $^{\circ}$ C, and the heat of vaporization of water at 100 $^{\circ}$ C is 2,256 kJ/kg.What is the final equilibrium temperature when 5.00 grams of ice at -15.0 $^{\circ}$ C is mixed with 40.0 grams of water at 75.0 $^{\circ}$ C?

A) 30.1

^{\circ}

C
B) 28.3

^{\circ}

C
C) 20.9

^{\circ}

C
D) 18.6

^{\circ}

C
E) 16.1

^{\circ}

C

Accepted Answer

The answer of The specific of ice is 2.10 kJ/kg...

Question 30

The specific heat of ice is 2.10 kJ/kg $^{\circ}$ C,the heat of fusion for ice at 0 $^{\circ}$ C is 333.7 kJ/kg,the specific heat of water 4.186 kJ/kg $^{\circ}$ C,the heat of vaporization of water at 100 $^{\circ}$ C is 2,256 kJ/kg,and the specific heat of steam is 2.020 kJ/kg $^{\circ}$ C.What is the final equilibrium temperature when 40.0 grams of ice at 0 $^{\circ}$ C is mixed with 5.00 grams of steam at 120 $^{\circ}$ C?

A) 3.01

^{\circ}

C
B) 2.65

^{\circ}

C
C) 1.21

^{\circ}

C
D) 1.07

^{\circ}

C
E) 0.90

^{\circ}

C

Accepted Answer

The answer of The specific heat of ice is 2.10...

Question 31

The molar specific heat of a diatomic ideal gas at constant volume is Cv = 5/2 R.What is the heat needed to heat 28.00 g of air from 20.00$^{\circ}$C to 85.00$^{\circ}$C?&#10;A) 1,350 J&#10;B) 2,890 J&#10;C) 1,753 J&#10;D) 1,540 J&#10;E) 1,443 J

Accepted Answer

The answer of The molar specific heat of a diatomic...

Question 32

A 2000 kg car is traveling at 20.0 m/s down a long mountain grade of 1.00%.The mountain road is 3.00 km long.The heat generated at the brakes due to friction heats up the brakes.The mass of the brake system is 20.0 kg and it has a specific heat of 0.200 kcal/kg $^{\circ}$ C.What is the increase in the temperature of the brakes?

A) 22.3

^{\circ}

C
B) 35.1

^{\circ}

C
C) 40.2

^{\circ}

C
D) 45.2

^{\circ}

C
E) 53.6

^{\circ}

C

Accepted Answer

The answer of A 2000 kg car is traveling at...

Question 33

The heat of vaporization of water at 100.0$^{\circ}$C is 2,256 kJ/kg.What is the heat of vaporization of water in cal/gm?&#10;A) 365.3&#10;B) 418.6&#10;C) 497.2&#10;D) 538.9&#10;E) 684.1

Accepted Answer

The answer of The heat of vaporization of water at...

Question 34

What is the heat needed to heat 16.0 grams of helium gas at constant volume from 20.0$^{\circ}$C to 85.0$^{\circ}$C?&#10;A) 4.23 kJ&#10;B) 3.24 kJ&#10;C) 2.02 kJ&#10;D) 1.95 kJ&#10;E) 0.650 kJ

Accepted Answer

The answer of What is the heat needed to heat...

Question 35

The heat of fusion for ice at 0$^{\circ}$C is 333.7 kJ/kg,the specific heat of water 4.186 kJ/kg $^{\circ}$C,and the heat of vaporization of water at 100$^{\circ}$C is 2,256 kJ/kg.What is the energy needed to vaporize 100 grams of ice at starting at 0$^{\circ}$C?&#10;A) 600 kJ&#10;B) 500 kJ&#10;C) 400 kJ&#10;D) 300 kJ&#10;E) 200 kJ

Accepted Answer

The answer of The heat of fusion for ice at...

Question 36

The heat of fusion for gold at 1,063$^{\circ}$C is 66.6 kJ/kg and the specific heat of gold is 0.128 kJ/kg$^{\circ}$C.What is the energy needed to melt 100 grams of gold starting at 0$^{\circ}$C?&#10;A) 20.3 kJ&#10;B) 17.8 kJ&#10;C) 12.3 kJ&#10;D) 9.50 kJ&#10;E) 7.50 kJ

Accepted Answer

The answer of The heat of fusion for gold at...

Question 37

The specific heat of ice is 2.10 kJ/kg $^{\circ}$ C,the heat of fusion for ice at 0 $^{\circ}$ C is 333.7 kJ/kg,the specific heat of water 4.186 kJ/kg $^{\circ}$ C,and the heat of vaporization of water at 100 $^{\circ}$ C is 2256 kJ/kg.What is the final equilibrium temperature when 20.0 grams of ice at 15.0 $^{\circ}$ C is mixed with 5.00 grams of steam at 100 $^{\circ}$ C?

A) 44.1

^{\circ}

C
B) 48.9

^{\circ}

C
C) 52.7

^{\circ}

C
D) 58.0

^{\circ}

C
E) 65.2

^{\circ}

C

Accepted Answer

The answer of The specific heat of ice is 2.10...

Question 38

The heat of fusion for lead at 327.0$^{\circ}$C is 22.9 kJ/kg and the specific heat of lead is 0.130 kJ/kg$^{\circ}$C.What is the energy needed to melt 100 grams of lead starting at 0$^{\circ}$C?&#10;A) 3.56 kJ&#10;B) 4.23 kJ&#10;C) 6.54 kJ&#10;D) 7.02 kJ&#10;E) 7.76 kJ

Accepted Answer

The answer of The heat of fusion for lead at...

Question 39

The heat of fusion for silver at 960.8$^{\circ}$C is 88.3 kJ/kg and the specific heat of silver is 0.235 kJ/kg$^{\circ}$C.What is the energy needed to melt 100 grams of silver starting at 0$^{\circ}$C?&#10;A) 40.5 kJ&#10;B) 31.4 kJ&#10;C) 25.4 kJ&#10;D) 19.5 kJ&#10;E) 13.7 kJ

Accepted Answer

The answer of The heat of fusion for silver at...

Question 40

A 2000 kg car is traveling at 15.0 m/s down a long mountain grade of 2.0%.The mountain road is 5.0 km long.The heat generated at the brakes due to friction heats up the brakes.The mass of the brake system is 20.0 kg and it has a specific heat of 0.200 kcal/kg $^{\circ}$ C.What is the increase in the temperature of the brakes?

A) 43

^{\circ}

C
B) 54

^{\circ}

C
C) 83

^{\circ}

C
D) 95

^{\circ}

C
E) 117

^{\circ}

C

Accepted Answer

The answer of A 2000 kg car is traveling at...

Question 41

A brass plate with a thickness of 1.00 cm is placed over a copper plate with a thickness of 2.00 cm.The coefficient of thermal conductivity of brass is 100 W/m $^{\circ}$ C and of copper is 400 W/m $^{\circ}$ C.What is the effective coefficient of thermal conductivity for the brass-copper layer?

A) 150 W/m

^{\circ}

C
B) 200 W/m

^{\circ}

C
C) 250 W/m

^{\circ}

C
D) 300 W/m

^{\circ}

C
E) 350 W/m

^{\circ}

C

Accepted Answer

The answer of A brass plate with a thickness of...

Question 42

A 100 gram glass container contains 200 grams of water and 100 grams of ice all at 0 $^{\circ}$ C.A 200 gram piece of lead at 100 $^{\circ}$ C is added to the water and ice in the container.What is the final temperature of the system? (specific heat of ice = 2,000 J/kg $^{\circ}$ C ,specific heat of water = 4,186 J/kg $^{\circ}$ C,heat of fusion of water = 333.7 kJ/kg,specific heat of glass = 837.2 J/km $^{\circ}$ C,specific heat of lead = 127.7 J/km $^{\circ}$ C)

A) 1.85

^{\circ}

C
B) 2.04

^{\circ}

C
C) 2.86

^{\circ}

C
D) 3.43

^{\circ}

C
E) 4.01

^{\circ}

C

Accepted Answer

The answer of A 100 gram glass container contains 200...

Question 43

A Styrofoam cooler has a surface area of 2,700 cm² and a wall thickness of 3.00 cm.Styrofoam has a coefficient of thermal conductivity of 0.010 W/m $^{\circ}$ C.A 2.00 kg block of ice is placed inside the cooler that has a temperature inside of 2 $^{\circ}$ C.When the temperature outside is 30.0 $^{\circ}$ C,the ice lasts for 8.00 hours.If the temperature outside becomes 20.0 $^{\circ}$ C,then how long will the ice last?

A) 20.3 hr
B) 18.5 hr
C) 12.4 hr
D) 10.1 hr
E) 8.5 hr

Accepted Answer

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Question 44

A brass rod with a length of 10.0 cm is placed end to end with an aluminum rod with a length of 30.0 cm and this system is placed between a hot temperature of 100 $^{\circ}$ C and a cold temperature of 10.0 $^{\circ}$ C.The coefficient of thermal conductivities of the brass and the aluminum are 100 W/m C and 230 W/m $^{\circ}$ C respectively.The rods have the same cross sectional area of 20.0 cm².What is the heat flow from the hot temperature to the cold temperature?

A) 55.3 W
B) 65.3 W
C) 70.3 W
D) 78.1 W
E) 85.3 W

Accepted Answer

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Question 45

A brass rod with a length of 30.0 cm is placed side by side with an aluminum rod with a length of 30.0 cm and this system is placed between a hot temperature of 100 $^{\circ}$ C and a cold temperature of 10.0 $^{\circ}$ C.The coefficient of thermal conductivities of the brass and the aluminum are 100 W/m $^{\circ}$ C and 230 W/m $^{\circ}$ C respectively.The brass rod has a cross sectional area of 20.0 cm² and the aluminum rod has a cross sectional area of 30.0 cm².What is the heat flow from the hot temperature to the cold temperature?

A) 542 W
B) 26.7 W
C) 54.2W
D) 267 W

Accepted Answer

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Question 46

A metal rod is placed between two temperature sources so that heat can flow between them.One temperature is 90.0 $^{\circ}$ C and the other temperature is 25.0 $^{\circ}$ C.The length of the rod is 30.0 cm and the cross sectional area is 10.0 cm².If 15.0 watts of heat flows between the hot temperature and the cold temperature,then what is the coefficient of thermal conductivity for the metal?

A) 69.2 W/m

\bullet

^{\circ}

C
B) 58.2 W/m

\bullet

^{\circ}

C
C) 50.4 W/m

\bullet

^{\circ}

C
D) 46.3 W/m

\bullet

^{\circ}

C
E) 44.2 W/m

\bullet

^{\circ}

C

Accepted Answer

The answer of A metal rod is placed between two...

Question 47

A brass rod is placed between two temperature sources so that heat can flow between them.One temperature is 80 $^{\circ}$ C and the other temperature is 20 $^{\circ}$ C.The length of the rod is 50.0 cm and the cross sectional area is 15.0 cm².If the coefficient of thermal conduction for brass is 100 W/m $^{\circ}$ C,then what is the heat flow between the hot temperature and the cold temperature?

A) 7.5 W
B) 8.2 W
C) 9.4 W
D) 12 W
E) 18 W

Accepted Answer

The answer of A brass rod is placed between two...

Question 48

The specific heat of ice is 2.100 kJ/kg $^{\circ}$ C,the heat of fusion for ice at 0 $^{\circ}$ C is 333.7 kJ/kg,the specific heat of water 4.186 kJ/kg $^{\circ}$ C,the heat of vaporization of water at 100.0 $^{\circ}$ C is 2,256 kJ/kg,and the specific heat of steam is 2.020 kJ/kg $^{\circ}$ C.What is the final equilibrium temperature when 20.00 grams of ice at -15.0 $^{\circ}$ C is mixed with 5.000 grams of steam at 120.0 $^{\circ}$ C?

A) 59.92

^{\circ}

C
B) 56.03

^{\circ}

C
C) 52.76

^{\circ}

C
D) 49.34

^{\circ}

C
E) 45.67

^{\circ}

C

Accepted Answer

The answer of The specific heat of ice is 2.100...

Question 49

The specific heat of ice is 2.10 kJ/kg $^{\circ}$ C,the heat of fusion for ice at 0 $^{\circ}$ C is 333.7 kJ/kg,the specific heat of water 4.186 kJ/kg $^{\circ}$ C,the heat of vaporization of water at 100 $^{\circ}$ C is 2,256 kJ/kg,and the specific heat of steam is 2.020 kJ/kg $^{\circ}$ C.What is the final equilibrium temperature when 40.0 grams of ice at 0 $^{\circ}$ C is mixed with 5.00 grams of steam at 120 $^{\circ}$ C?

A) 3.01

^{\circ}

C
B) 2.65

^{\circ}

C
C) 1.21

^{\circ}

C
D) 1.07

^{\circ}

C
E) 0.90

^{\circ}

C

Accepted Answer

The answer of The specific heat of ice is 2.10...

Question 50

The specific heat of ice is 2.100 kJ/kg $^{\circ}$ C,the heat of fusion for ice at 0 $^{\circ}$ C is 333.7 kJ/kg,the specific heat of water 4.186 kJ/kg $^{\circ}$ C,the heat of vaporization of water at 100.0 $^{\circ}$ C is 2,256 kJ/kg,and the specific heat of steam is 2.020 kJ/kg $^{\circ}$ C.What is the final equilibrium temperature when 20.00 grams of ice at -15.0 $^{\circ}$ C is mixed with 5.000 grams of steam at 120.0 $^{\circ}$ C?

A) 59.92

^{\circ}

C
B) 56.03

^{\circ}

C
C) 52.76

^{\circ}

C
D) 49.34

^{\circ}

C
E) 45.67

^{\circ}

C

Accepted Answer

The answer of The specific heat of ice is 2.100...

Question 51

A 100 gram glass container contains 200 grams of water and 100 grams of ice all at 0 $^{\circ}$ C.A 200 gram piece of lead at 100 $^{\circ}$ C is added to the water and ice in the container.What is the final temperature of the system? (specific heat of ice = 2,000 J/kg $^{\circ}$ C ,specific heat of water = 4,186 J/kg $^{\circ}$ C,heat of fusion of water = 333.7 kJ/kg,specific heat of glass = 837.2 J/km $^{\circ}$ C,specific heat of lead = 127.7 J/km $^{\circ}$ C)

A) 1.85

^{\circ}

C
B) 2.04

^{\circ}

C
C) 2.86

^{\circ}

C
D) 3.43

^{\circ}

C
E) 4.01

^{\circ}

C

Accepted Answer

The answer of A 100 gram glass container contains 200...

Question 52

The specific heat of steam is 2,020 J/kg K in the mks system of units.What is the value of the specific heat of steam in cal/gm $^{\circ}$C?&#10;A) 1.000&#10;B) 0.8765&#10;C) 0.6812&#10;D) 0.4826&#10;E) 0.2563

Accepted Answer

The answer of The specific heat of steam is 2,020...

Question 53

A student is sleeping under a small goose-down comforter that has coefficient of thermal conductivity of 0.025 W/m $^{\circ}$C.The thickness of the down comforter is 5.0 cm and the area of the comforter is 2.0 m².If the temperature difference between inside of the comforter and the outside of the comforter 40$^{\circ}$C,then what is the rate of heat flow through the comforter? A) 10 W B) 20 W C) 30 W D) 40 W E) 50 W

Accepted Answer

The answer of A student is sleeping under a small...

Question 54

A brass rod with a length of 20.0 cm is placed end to end with an aluminum rod with a length of 20.0 cm and this system is placed between a hot temperature of 100$^{\circ}$C and a cold temperature of 10.0$^{\circ}$C.The coefficient of thermal conductivities of the brass and the aluminum are 100 W/m C and 230 W/m $^{\circ}$C respectively.The rods have the same cross sectional area of 25.0 cm².What is the heat flow from the hot temperature to the cold temperature? A) 78.4 W B) 70.2 W C) 65.3 W D) 61.5 W E) 55.5 W

Accepted Answer

The answer of A brass rod with a length of...

Question 55

The specific heat of ice is 2.10 kJ/kg $^{\circ}$ C,the heat of fusion for ice at 0 $^{\circ}$ C is 333.7 kJ/kg,the specific heat of water 4.186 kJ/kg $^{\circ}$ C,the heat of vaporization of water at 100 $^{\circ}$ C is 2,256 kJ/kg,and the specific heat of steam is 2.020 kJ/kg $^{\circ}$ C.What is the final equilibrium temperature when 40.0 grams of ice at 0 $^{\circ}$ C is mixed with 5.00 grams of steam at 120 $^{\circ}$ C?

A) 3.01

^{\circ}

C
B) 2.65

^{\circ}

C
C) 1.21

^{\circ}

C
D) 1.07

^{\circ}

C
E) 0.90

^{\circ}

C

Accepted Answer

The answer of The specific heat of ice is 2.10...

Question 56

The specific heat of ice is 2.100 kJ/kg $^{\circ}$ C,the heat of fusion for ice at 0 $^{\circ}$ C is 333.7 kJ/kg,the specific heat of water 4.186 kJ/kg $^{\circ}$ C,the heat of vaporization of water at 100.0 $^{\circ}$ C is 2,256 kJ/kg,and the specific heat of steam is 2.020 kJ/kg $^{\circ}$ C.What is the final equilibrium temperature when 20.00 grams of ice at -15.0 $^{\circ}$ C is mixed with 5.000 grams of steam at 120.0 $^{\circ}$ C?

A) 59.92

^{\circ}

C
B) 56.03

^{\circ}

C
C) 52.76

^{\circ}

C
D) 49.34

^{\circ}

C
E) 45.67

^{\circ}

C

Accepted Answer

The answer of The specific heat of ice is 2.100...

Question 57

A concrete wall is 15.0 cm thick and has an area of 10.0 m².A layer of wood that is 2.50 cm thick is placed over the wall to reduce the loss of heat by thermal conduction.The coefficient thermal conductivity of concrete is 1.70 W/m $^{\circ}$C and the coefficient of thermal conductivity of wood is 0.0400 W/m $^{\circ}$C.What is the effective coefficient of thermal conductivity of the wood on concrete system? A) 0.245 W/m$^{\circ}$C B) 1.22 W/m$^{\circ}$C C) 1.65 W/m$^{\circ}$C D) 2.02 W/m$^{\circ}$C E) 2.34 W/m$^{\circ}$C

Accepted Answer

The answer of A concrete wall is 15.0 cm thick...

Question 58

The inside temperature of a house is 65$^{\circ}$F.When the temperature outside the house is 35$^{\circ}$F,the furnace supplies 100 Joules per hour to keep the inside of the house warm.If the temperature outside the house goes to 50$^{\circ}$F,then what is the fuel consumption of the furnace?&#10;A) 38 Joules per hour&#10;B) 42 Joules per hour&#10;C) 50 Joules per hour&#10;D) 56 Joules per hour&#10;E) 61 Joules per hour

Accepted Answer

The answer of The inside temperature of a house is...

Question 59

The specific heat of water is 1.000 cal/gm $^{\circ}$C.What is the specific heat of water in the mks system of units?&#10;A) 2,124 J/kg$^{\circ}$C&#10;B) 2,765 J/kg$^{\circ}$C&#10;C) 3,417 J/kg$^{\circ}$C&#10;D) 3,764 J/kg$^{\circ}$C&#10;E) 4,186 J/kg$^{\circ}$C

Accepted Answer

The answer of The specific heat of water is 1.000...

Question 60

The specific heat of ice is 2.10 kJ/kg $^{\circ}$ C,the heat of fusion for ice at 0 $^{\circ}$ C is 333.7 kJ/kg,the specific heat of water 4.186 kJ/kg $^{\circ}$ C,the heat of vaporization of water at 100 $^{\circ}$ C is 2,256 kJ/kg,and the specific heat of steam is 2.020 kJ/kg $^{\circ}$ C.What is the final equilibrium temperature when 40.0 grams of ice at 0 $^{\circ}$ C is mixed with 5.00 grams of steam at 120 $^{\circ}$ C?

A) 3.01

^{\circ}

C
B) 2.65

^{\circ}

C
C) 1.21

^{\circ}

C
D) 1.07

^{\circ}

C
E) 0.90

^{\circ}

C

Accepted Answer

The answer of The specific heat of ice is 2.10...

Question 61

The solar energy coming to the earth by radiation is 1340 W/m² when the temperature of the Sun is 5800 K.If the temperature of the Sun increased by 10.00%,then what would be the amount of solar radiation coming to the earth? A) 1492 W/m² B) 1632 W/m² C) 1828 W/m² D) 1962 W/m² E) 2004 W/m²

Accepted Answer

The answer of The solar energy coming to the earth...

Question 62

What form of convection causes the offshore sea breeze in the evening?&#10;A) natural convection of air falling over the cooling land&#10;B) forced convection air or force convection of water&#10;C) forced convection of water&#10;D) natural convection of air rising over the warming land

Accepted Answer

The answer of What form of convection causes the offshore...

Question 63

A tungsten light bulb is glowing with blackbody radiation whose maximum occurs at a wavelength of 700.0 nm.What is the temperature of the tungsten element?&#10;A) 3750 K&#10;B) 4140 K&#10;C) 4250 K&#10;D) 4790 K&#10;E) 5030 K

Accepted Answer

The answer of A tungsten light bulb is glowing with...

Question 64

The solar energy coming to the earth by radiation is 1,340 W/m².If the sun has a radius of 7.000 $\times$ 10⁸m,is a perfect radiator and is located 1.500 $\times$ 10¹¹m from the earth,then what is the temperature of the sun? A) 6430 K B) 5760 K C) 4230 K D) 3670 K E) 3210 K

Accepted Answer

The answer of The solar energy coming to the earth...

Deck 14: Heat