A heat engine operates in a Carnot cycle between 84.0°C and 347°C. It absorbs 21001 J of energy per cycle from?
A heat engine operates in a Carnot cycle between 84.0°C and 347°C. It absorbs 21001 J of energy per cycle from the hot reservoir. The duration of each cycle is 5.00 s.
(a) What is the mechanical power output of this engine?
W
(b) How much energy does it expel in each cycle by heat?
J
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Th = 273 + 347 = 620 K
Tc = 273 + 84 = 357 K
Carnot Efficiency = Th-Tc/Th = 263/357 = 0.737
Work output = (0.737)(21001) = 15,478 J
Power output = 15,478/5.00 = 3096 watts ANS (a)
energy expelled to cold reservoir = 21001 - 15,478 = 5523 J ANS (b)