The entropy of a closed system must increase in an irreversible adiabatic process.

The entropy of a closed system must increase in an irreversible adiabatic process. A: 正确 B: 错误

Which of the following phenomena belongs to an adiabatic process ?() A: The temperature of the system remains unchanged B: The system does not absorb heat from the environment C: No heat exchange between the system and the environment D: The internal energy of the system remains unchanged

For a system of an ideal gas, in which process of the following that the heat absorbed by the system and the work done toward the surroundings are positive? A: Isochoric (等体) and pressure decreasing process. B: Isothermal (等温) and expanding process. C: Adiabatic and expanding process. D: Isobaric (等压) and compressed process