10) (II) A heat engine operates between reservoirs at tempera- tures 800 K and 300 K. In one cycle it absorbs 1200 J of heat and does 300 J of work. Find: (a) the efficiency of the engine; (b) the change in entropy of each of the two reser- voirs and of the universe AS. (c) How much work would be done by a Carnot engine that absorbed the same quantity of heat from the hot reservoir? (d) Show that the work done by the real engine is TCAS, less than that done by the Carnot engine, where Tc is the temperature of the cold reservoir.
10) (II) A heat engine operates between reservoirs at tempera- tures 800 K and 300 K. In one cycle it absorbs 1200 J of heat and does 300 J of work. Find: (a) the efficiency of the engine; (b) the change in entropy of each of the two reser- voirs and of the universe AS. (c) How much work would be done by a Carnot engine that absorbed the same quantity of heat from the hot reservoir? (d) Show that the work done by the real engine is TCAS, less than that done by the Carnot engine, where Tc is the temperature of the cold reservoir.
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Transcribed Image Text:10, (II) A heat engine operates between reservoirs at tempera-
tures 800 K and 300 K. In one cycle it absorbs 1200 J of heat
and does 300 J of work. Find: (a) the efficiency of the
engine; (b) the change in entropy of each of the two reser-
voirs and of the universe AS. (c) How much work would
be done by a Carnot engine that absorbed the same quantity
of heat from the hot reservoir? (d) Show that the work done
by the real engine is TCAS, less than that done by the
Carnot engine, where Tc is the temperature of the cold
reservoir.
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