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in Physics by (70.7k points)

An engine operates on the cycle shown in the PV diagram below. The working substance of the engine is an ideal monatomic gas. The processes A → B and C → D are isobaric, while processes B → C and D → A are isochoric.

What is the efficiency of a Carnot engine operating between the same maximum and minimum temperatures as this engine? 

(A) 1/6 

(B) 1/3 

(C) 1/2 

(D) 3/5 

(E) 5/6 

1 Answer

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Best answer

Correct option (E) 5/6

Explanation:

eC = (TH _ TC)/TH where TH ∝ pBVB (the highest temperature) and TC ∝ pDVD (the lowest temperature) gives eC = (6p0V0 – p0V0)/p0V0.

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