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Question

Question: If the P-V diagrams of two thermodynamics devices working in a cyclic process are as shown in the fi...

If the P-V diagrams of two thermodynamics devices working in a cyclic process are as shown in the figure, then –

A

A is a heat engine, B is a heat pump/refrigerator

B

B is a heat engine, A is a heat pump/refrigerator

C

Both A and B are heat engines

D

Both A and B are heat pumps/refrigerator

Answer

A is a heat engine, B is a heat pump/refrigerator

Explanation

Solution

From A : DQ > 0, DU = 0, DW > 0

From B : DQ < 0, DU = 0, DW < 0