Understanding Thermodynamics: Heat and Temperature

Why does the cheese on a pizza feel hotter than the crust, even though both are at the same temperature?

• The cheese is at a higher temperature.

• The crust is a better insulator.

• The crust cools down faster.

• The cheese has more internal energy due to its density.

What does internal energy in a substance consist of?

• Both kinetic and potential energy

• Neither kinetic nor potential energy

• Only potential energy

• Only kinetic energy

How is temperature related to kinetic energy?

• Temperature is unrelated to kinetic energy.

• Temperature is the potential energy of molecules.

• Temperature is the total kinetic energy of all molecules.

• Temperature is proportional to the average kinetic energy per molecule.

Which temperature scale does not allow for negative values?

• Rankine

• Fahrenheit

• Kelvin

• Celsius

What is heat in terms of energy transfer?

• Heat is the energy transfer between substances of different temperatures.

• Heat is the energy that cannot be transferred.

• Heat is the potential energy of a substance.

• Heat is the energy stored within a substance.

What happens when your hand holds a hot cup of coffee?

• No heat transfer occurs.

• The cup cools down immediately.

• Heat transfers from the cup to your hand.

• Heat transfers from your hand to the cup.

What is thermal equilibrium?

• When there is no temperature variation between two substances.

• When one substance is hotter than the other.

• When two substances have different temperatures.

• When heat transfer is maximum.

How does the volume of a substance affect its internal energy?

• Larger volume means more internal energy if the temperature is the same.

• Smaller volume means more internal energy.

• Larger volume always means higher temperature.

• Volume does not affect internal energy.

What is specific heat capacity?

• The energy required to raise the temperature of a unit mass of a substance by one degree.

• The energy required to break chemical bonds.

• The energy required to change the state of a substance.

• The energy required to cool a substance.

What is latent heat?

• The heat that cannot be measured.

• The heat required to change the temperature of a substance.

• The heat lost during energy transfer.

• The heat required to change the state of a substance without changing its temperature.