The gas within a cylinder of an engine undergoes a net change in volume of 1.50 * 10-3 m3 when it does work at a constant pressure of 3.27 x 105 Pa If the efficiency of the engine is 0.225, how much work must the engine give up as heat to the low-temperature reservoir?

Question

Jocelynn Carpenter

Physics

24 September, 14:32

The gas within a cylinder of an engine undergoes a net change in volume of 1.50 * 10-3 m3 when it does work at a constant pressure of 3.27 x 105 Pa If the efficiency of the engine is 0.225, how much work must the engine give up as heat to the low-temperature reservoir?

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Sandra · Answer 1

work = p*v = 3.27*10^5*1.5*10^-3 = 490.5 joule

efficiency = w/q in

:. qin = w/efficiency = 490.5/0.225=2180 joule

qout = q in - work = 1689.5 joule

q out is work given as heat