複選題

12. Which ones of the following statements of the second law of thermodynamics are wrong?
(A) No cyclical heat engine has a greater efficiency than a reversible engine operating between the same two temperatures.
(B) It is impossible for a cyclical device to transfer heat continuously from a hot body to a cold body without the input of work or other effect on the environment.
(C) It is impossible for a heat engine that operates in a cycle to convert its work input completely into heat.
(D) In a reversible process the entropy of an isolated system stays constant; in an irreversible process the entropy decreases.
(E) In a reversible process the entropy of an isolated system increases; in an irreversible process the entropy stays constant.