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 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 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.