Which one of the following statements about an ideal gas is true? O During an isochoric process, the change in internal energy of the gas is exactly equal to the amount of heat flow into or out of the gas O During an isothermal process, the entropy of the gas does not change. O During an isothermal process, no heat enters or leaves the gas. O During an adiabatic process, the temperature of the gas does not change. O During an isobaric process, no work is done on or by the gas.

Which one of the following statements about an ideal gas is true? O During an isochoric process, the change in internal energy of the gas is exactly equal to the amount of heat flow into or out of the gas O During an isothermal process, the entropy of the gas does not change. O During an isothermal process, no heat enters or leaves the gas. O During an adiabatic process, the temperature of the gas does not change. O During an isobaric process, no work is done on or by the gas.