JEE Main 2026 Chemistry question

ChemistryThermodynamicsJEE Main 2026

Gas 'A' undergoes change from state 'X' to state 'Y'. In this process, the heat absorbed and work done by the gas is 10 J and 18 J respectively. Now gas is brought back to state 'X' by another process during which 6 J of heat is evolved. In the reverse process of 'Y' to 'X',

Answer: (D)

Solution

ΔU(X→Y) = 10 − 18 = −8 J, so ΔU(Y→X) = +8 J. For Y→X, q = −6 J: ΔU = q − w gives

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Question ID VK-015163