Unit 2 Thermodynamics Quiz

What does the internal energy of a substance depend on?

• The substance's pressure

• The substance's volume

• The substance's temperature

• The substance's mass

Which statement best describes the behavior of molecules in relation to thermal behavior of matter?

• Molecules remain static which gives rise to thermal behavior.

• The behavior of molecules is unrelated to the thermal behavior of matter.

• The behavior of molecules gives rise to the thermal behavior of matter.

• Only external energy influences the thermal behavior of matter.

What can be determined from the area under the graph in a PV diagram according to the first law of thermodynamics?

• Heat added or removed from the gas

• Internal energy using the ideal gas law

• Volume of the gas only

• Work done on or by the gas

What is the significance of absolute zero in terms of molecular vibrations and gas properties?

• Molecular vibrations increase and gas expands.

• Molecular vibrations stop and gas has maximum pressure.

• Molecular vibrations stop and gas has no pressure or volume.

• Molecular vibrations continue but gas has no volume.

Which of the following is NOT a method of heat transfer?

• Conduction

• Convection

• Radiation

• Sublimation

What is heat in terms of energy transfer?

• Movement of mechanical parts

• Transfer of thermal energy from one body to another

• Electrical energy transfer

• Chemical reaction release

Which statement best describes the relationship between the temperature of an object and its average kinetic energy?

• Temperature is inversely proportional to kinetic energy

• Temperature is unrelated to kinetic energy

• Temperature is directly related to average kinetic energy per molecule

• Temperature is a measure of potential energy

What does the first law of thermodynamics state about the changes in a gas's internal energy?

• It is equal to the heat removed from the gas

• It is the difference between the heat added and work done by the gas

• It equals the heat added to the gas plus the work done on the gas

• It is always constant regardless of heat and work changes

Which process in a PV diagram is characterized by a constant temperature?

• Isothermal

• Adiabatic

• Isobaric

• Isochoric

During which of the following processes does the volume of a gas remain constant?

• Isothermal

• Adiabatic

• Isobaric

• Isochoric