JEE Main 2026 Chemistry question
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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