Question 1

What is the value of 98 °F in units of °C?

Accepted Answer

To convert from Fahrenheit to Celsius, subtract 32 and then multiply by 5/9. Therefore, 98 °F = (98-32) x 5/9 = 37 °C. The closest option is B, which is 37.

Question 2

An energy diagram that shows the reactants having greater energy than the products illustrates an:

Accepted Answer

An energy diagram where reactants have greater energy than products indicates that energy is released during the reaction, characterizing it as an exothermic reaction.

Question 3

What type of energy is associated with the burning of gasoline?

Accepted Answer

The burning of gasoline involves a chemical reaction, which releases energy in the form of heat and light. This energy is therefore associated with chemical energy, making option D the correct choice.

Question 4

In order,what is the freezing point,room temperature and boiling point of water according to the Fahrenheit scale?

Accepted Answer

According to the Fahrenheit scale, the freezing point of water is 32 degrees, room temperature is typically around 68-75 degrees, and the boiling point of water is 212 degrees. Option A provides these values in the correct order.

Question 5

In order,what is the freezing point,room temperature and boiling point of water according to the Celsius scale?

Accepted Answer

The freezing point of water on the Celsius scale is 0°C, room temperature is around 25°C, and the boiling point of water is 100°C. Option A is incorrect as the boiling point is given as 212°C which is incorrect for the Celsius scale. Option B is incorrect as the room temperature of 75°C is too high. Option D is incorrect as the given values are correct for the Kelvin scale, not Celsius. Therefore, option C is the correct choice.

Question 6

In calculating the relationship between the amount of heat added to a substance and the corresponding temperature change,the specific heat capacity is usually represented by which symbol?

Accepted Answer

Specific heat capacity is usually represented by the symbol "C". "q" represents the amount of heat added, "ΔT" represents the temperature change, "m" represents the mass of the substance, and "K" represents the temperature in Kelvin.

Question 7

Which type of energy is associated with motion?

Accepted Answer

Kinetic energy is associated with motion. It is the energy an object possesses due to its motion.

Question 8

How many kilojoules are there in 95.0 Calories?

Accepted Answer

1 calorie is equal to 4.184 kilojoules, so to convert from Calories to kilojoules, we must multiply by 4.184.

95.0 Calories x (4.184 kJ/1 calorie) = 397 kJ

Therefore, the answer is C) 397.

Question 9

How many joules are there in a 255 calorie snack bar?

Accepted Answer

The answer of How many joules are there in a...

Question 10

Which of the following is NOT true?

Accepted Answer

Water boils at 100°C on the Celsius scale and 373.15K on the Kelvin scale, indicating that the temperature values at which water boils are not the same on both scales.

Question 11

If a solid piece of shiny sodium metal is exposed to chlorine gas,a large amount of heat is released and the white solid sodium chloride (table salt)forms.Based on this information,which of the following statements is TRUE?

Accepted Answer

The release of heat indicates an exothermic process. Option A is incorrect because a chemical change, not a physical change, is occurring as a new substance with different properties is formed. Option B is incorrect because mass is conserved in a chemical reaction, although the physical appearance of the reactants and products may change. Option C is incorrect because sodium chloride is a compound, not an element.

Question 12

If a particular process is endothermic,the reverse process must be a (an):

Accepted Answer

If a process is endothermic, it absorbs heat from the surroundings. Therefore, the reverse process, which involves releasing heat back into the surroundings, must be exothermic. Thus, the best choice is C.

Question 13

What is the value of 27°C on the Fahrenheit temperature scale?

Accepted Answer

The answer of What is the value of 27°C on...

Question 14

How many calories are there in a 255 Calorie snack bar?

Accepted Answer

The answer of How many calories are there in a...

Question 15

What is the value of 335 K on the Celsius temperature scale?

Accepted Answer

The answer of What is the value of 335 K...

Question 16

Which of the following items is NOT a common unit of energy?

Accepted Answer

Torr is a unit of pressure, not energy. A joule is the standard unit of energy in the SI system, while calorie is often used in nutrition and food science. Kilowatt-hour is a unit of electrical energy commonly used on utility bills.

Question 17

The boiling point of water is:
(1)212 °F (2)0°C (3)373 K

Accepted Answer

The boiling point of water is 100°C or 212°F. These two options are essentially the same, as they represent different units of temperature measurement. However, option 2 lists 0°C as the boiling point of water, which is incorrect (0°C is actually the freezing point of water). Option 3 lists the boiling point of water as 373 K, which is also correct. Therefore, the correct answer is choice C, which includes both 1 and 3, the only options that are correct.

Question 18

Melting point can be defined as the temperature when a solid becomes a liquid.The melting point of the chemical acetone is -95°C.Which state of matter would you expect to exist for acetone at a temperature of -94°C?

Accepted Answer

Since the melting point of acetone is -95°C, at -94°C, it would have just surpassed its melting point, meaning it would exist in a liquid state.

Question 19

Which type of energy is associated with position?

Accepted Answer

Potential energy is energy associated with an object's position or configuration in a force field.

Question 20

What is the value of 27°C on the Kelvin temperature scale?

Accepted Answer

To convert Celsius to Kelvin, add 273 to the Celsius temperature. 27+273=300, so the answer is C)300.

Quiz 3: Matter and Energy