168Chapt. 21Thermodynamics III: Second Law and Entropye) Entropy would always increase to a maximum in an open system.021 qmult 00330 1 4 3 easy deducto-memory: Carnot heat flows6. What is a key reason why the ideal Carnot engine is a reversible engine?a) Heat flows occur across non-zero temperature gradients.b) Heat flows occur across large temperature gradients.c) Heat flows occur across zero temperature gradients.d) Heat flows occur from cold to hot baths.e) There are no heat flows at all.021 qmult 00410 1 1 5 easy memory: Carnot efficiencyExtra keywords:physci7. The efficiencyεof the ideal Carnot engine (which is the most efficient of all possible heatengines) working between a hot bath of temperatureThand a cold bath of temperatureTcis:021 qmult 00420 1 4 2 easy deducto-memory: Carnot engines in practiceExtra keywords:physci
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