Ch4 Heat & Temp.

C. different amounts of heat.

A large and a small container of water with the same temperature have A. the same total amounts of internal energy. B. the same amounts of internal and external energy. C. different amounts of heat. D. the same amounts of all forms of energy.

False

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

D. All of the above.

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.

B. sometimes does not result in a temperature change.

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.

B. energy movement from higher temperature regions.

Anytime a temperature difference occurs, you can expect A. cold to move to where it is warmer. B. energy movement from higher temperature regions. C. no energy movement unless it is warm enough, at least above the freezing temperature. D. energy movement flowing slowly from cold to warmer regions.

C. remains the same.

As a solid goes through a phase change to a liquid, heat is absorbed and the temperature A. increases. B. decreases. C. remains the same. D. fluctuates.

False

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

True

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

True

Molecules are the smallest units of matter that retain the characteristic properties of a substance. True False

D. are held in nearly fixed positions by strong attractive forces.

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.

A. Substance A

Substance A has a higher specific heat than substance B. With all other factors equal, which requires the most energy to heat equal masses of A and B to the same temperature? A. Substance A B. Substance B C. Both require the same amount of heat. D. Answer depends on the density of each substance.

False

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

B. specific heat.

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.

B. adhesion.

The attractive forces between unlike molecules is called A. cohesion. B. adhesion. C. diffusion. D. friction.

C. freeze at a uniform low temperature.

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.

B. calorie.

The heat needed to warm one gram of water one Celsius degree is called a A. joule. B. calorie. C. Btu. D. kilocalorie.

True

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

True

The nutritionist's Calorie is really a kilocalorie. True False

False

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

C. conduction.

The transfer of energy from molecule to molecule is called A. convection. B. radiation. C. conduction. D. equilibrium.

B. conduction.

The transfer of heat that occurs when energy moves from molecules to molecule is called A. convection. B. conduction. C. radiation. D. phase change.

C. Kelvin and Celsius.

The two temperature scales with the same interval step size are the A. Celsius and Fahrenheit. B. Fahrenheit and Kelvin. C. Kelvin and Celsius. D. This does not exist.

A. has a higher specific heat.

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.

True

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

C. 37º

What is the average temperature of healthy humans on the Celsius scale? A. 100º B. 68º C. 37º D. 20º

C. -40º

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

C. it transfers heat to the surroundings.

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.

B. convection

Which method of heat flow requires the movement of matter to a new location? A. conduction B. convection C. radiation D. None of the above.

D. evaporating the water

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

B. second law of thermodynamics

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

B. lower specific heat.

With all other factors equal, the most likely to burn your mouth when taken directly from an oven is a food with A. higher specific heat. B. lower specific heat. C. Specific heat is not important in this situation. D. More information is needed.