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Olympiad workbookNSECThermodynamics (C)

Following is the P vs V plot of a cyclic process 1 2,2 3,3 4,4 1 , denoted as I, II, III and IV respectively for a system of one mole of an ideal gas. Assume that there is heat exchange between the system and surroundings only in II and IV. Which of the following is/are correct?

Options

AIn II and IV S is zero
BIn I and III, S is zero
CI and III are isothermal and reversible
DIn II and IV, change in internal energy of the gas ( U ) is zero

Correct answer

B. In I and III, S is zero

Step-by-step solution

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