170Chapt. 21Thermodynamics III: Second Law and Entropyb) thermodynamic disequilibrium.”c) varying, life-sustaining thermodynamic equilibrium.”d) elves in charge.”e) peace on Earth and goodwill to humankind.”Full-Answer Problems021 qfull 00100 3 5 0 tough thinking: reversible engine/frig I1. Using words, diagrams, or equations clearly show that a refrigerator more efficient than areversible engine leads to a contradiction of the classical statements of the second law and allobservations too.021 qfull 00200 3 5 0 tough thinking: reversible engine/frig II2. Let’s consider an engine and frig operating between a hot and a cold bath. The engine is used todrive the frig. The two baths are in self-thermodynamic equilibrium. Use primes to distinguishfrig from engine variables: i.e., for the frigQ′c(heat absorbed from the cold bath),Q′h(heat rejected to the hot bath),andW′(work input);and for the engineQc(heat rejected to the cold bath),Qh(heat absorbed from the hot bath),andW(work output).
This is the end of the preview.
access the rest of the document.