Heat and Internal Energy

Question 1

Which statement best distinguishes heat from temperature?

• AHeat is energy transferred due to a temperature difference, while temperature indicates hotness or coldness
• BHeat and temperature are identical quantities
• CTemperature is energy transferred between bodies
• DHeat measures the degree of hotness only

Question 2

When two bodies at different temperatures are placed in thermal contact, heat normally flows from:

• AThe colder body to the hotter body
• BThe hotter body to the colder body
• CThe smaller body to the larger body only
• DThe heavier body to the lighter body only

Question 3

Two bodies are in thermal equilibrium when they have:

• AEqual masses
• BEqual volumes
• CThe same temperature and no net heat transfer between them
• DThe same material in every case

Question 4

The internal energy of a substance includes the molecular:

• AMass and colour only
• BVolume and shape only
• CPressure and density only
• DKinetic and potential energies

Question 5

If the average kinetic energy of molecules increases, their motion generally becomes:

• AMore energetic
• BCompletely stationary
• CUnrelated to temperature in every case
• DImpossible to describe