ThermodynamicsHard

Question

Helium gas goes through a cycle ABCDA(consisting of two isochoric and two isobaric lines) as shown in figure. Efficiency of this cycle is nearly (Assume the gas to be close to ideal gas) :-

                    

Options

A.12.5%
B.15.4%
C.9.1%
D.10.5%

Solution

W = Area bounded by curve = P0V0
QAB = nCvᐃT = n
QBC = nCP DT = n R × ᐃT = 5P0V0
Total heat supplied P0V0 + 5P0V0 P0V0

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