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Question:

The above P-V diagram represents the thermodynamic cycle of an engine, operating with an ideal monoatomic gas. The amount of heat extracted from the source in a single cycle is?

(112)PoV0

4PoV0

(132)PoV0

PoV0

Solution:

Heat is extracted from the source would be in path DA and AB. Thus heat supplied = nCv(2To−To) + nCp(4To−To) = n3RTo/2 + n5R(2To)/2 = 13nRTo/2 = (13/2)PoVo