Deck 4: Heat and Temperature

Question 1

Liquid water at 0ºC has to give up energy in order to become ice at 0ºC.

Answer 1

True

Question 2

The process by which solids vaporize without first becoming a liquid is called

A)sublimation.
B)condensation.
C)evaporation.
D)boiling.

Answer 2

A

Question 3

The heat needed to warm one gram of water one Celsius degree is called a

A)joule.
B)calorie.
C)Btu.
D)kilocalorie.

Answer 3

B

Question 4

Molecules are the smallest units of matter with the characteristic properties of a substance.

Question 5

A liquid at 20ºC is twice as hot as the liquid at 10ºC.

Question 6

The sum of all the energy of the molecules of an object is called the temperature of that object.

Question 7

The attractive forces between unlike molecules is called

A)cohesion.
B)adhesion.
C)diffusion.
D)friction.

Question 8

The water in a swimming pool is cooler than the surrounding sidewalk because it

A)has a higher specific heat.
B)has weaker attractive forces.
C)loses heat more rapidly.
D)has a lower density.

Question 9

Iron heats up more rapidly than does aluminum because it has a greater specific heat.

Question 10

The molecules of a gas are much farther apart than molecules in a solid or liquid.

Question 11

Temperature is a measure of the amount of heat stored in a substance.

Question 12

In the equation: Q = mc∆t, the c stands for the

A)heat of vaporization.
B)number of calories gained or lost.
C)convection coefficient.
D)specific heat.

Question 13

What is the temperature that is the same numerical value on both the Fahrenheit and Celsius scale?

A)212º
B)0º
C)?-40º
D)-273º

Question 14

Your body judges temperature

A)very poorly, sensing only heat flow.
B)within 5 ^$\circ$ C of the actual temperature.
C)better than most thermometers.
D)None of the above.

Question 15

The nutritionist's Calorie is really a kilocalorie.

Question 16

When water vapor condenses to a liquid

A)it absorbs energy from the surroundings.
B)its temperature drops sharply.
C)it transfers heat to the surroundings.
D)its temperature rises slightly.

Question 17

Water beads up on wax paper because its cohesive forces are greater than the adhesive forces.

Question 18

The degrees on the Celsius scale are larger than degrees on the Fahrenheit scale.

Question 19

What is the average temperature of healthy humans on the Celsius scale?

A)100º
B)68º
C)37º
D)20º

Question 20

Molecules in a solid

A)are harder than molecules in liquids or gases.
B)transfer heat to their neighbors by a process called convection.
C)have no internal energy because they are not moving around.
D)are held in nearly fixed positions by strong attractive forces.

Question 21

Which thermodynamic law says that you cannot convert 100 percent of a heat source into mechanical energy?

A)first law of thermodynamics
B)second law of thermodynamics
C)third law of thermodynamics
D)law of increasing entropy

Question 22

When the evaporation rate equals the condensation rate, the space above the liquid is

A)heating.
B)cooling.
C)saturated.
D)in a phase change.

Question 23

A statement that the energy supplied to a system in the form of heat, minus the work done by the system, is equal to the change in internal energy represents the

A)first law of thermodynamics.
B)second law of thermodynamics.
C)third law of thermodynamics.
D)law of increasing entropy.

Question 24

Adding heat to a substance

A)always results in a temperature increase.
B)sometimes does not result in a temperature change.
C)sometimes results in a temperature decrease.
D)None of the above.

Question 25

Which of the following involves the greatest amount of heat when warming 100 grams of ice?

A)warming the ice
B)melting the ice
C)warming the water
D)evaporating the water

Question 26

Water molecules move back and forth between the liquid and gaseous phases

A)only when the space above a liquid is not saturated.
B)only at 100ºC.
C)only when the humidity is low.
D)at all times.

Question 27

The transfer of heat that occurs when energy moves from molecules to molecule is called

A)convection.
B)conduction.
C)radiation.
D)phase change.

Question 28

A passive solar home with direct solar gain requires

A)a large, open window space.
B)a calculated overhang.
C)storage mass without carpets or drapes.
D)All of the above.

Question 29

The heat death of the universe is a theoretical time in the future when the universe is supposed to

A)have a high enough temperature to kill all living things.
B)have a very high temperature, vaporizing all matter.
C)freeze at a uniform low temperature.
D)use up the entire supply of entropy.

Question 30

The amount of heat needed to increase the temperature of 1 gram of a substance 1 degree Celsius is known as

A)latent heat.
B)specific heat.
C)a calorie.
D)Btu.