If H is the change in enthalpy and U is the change in internal energy accompanying a gaseous reaction, _____ [CBSE PMT 1990]

MHT CET Chemistry question

If is the change in enthalpy and is the change in internal energy accompanying a gaseous reaction, [CBSE PMT 1990]

(A) is always greater than
(B) only if the number of moles of the products is greater than the number of the reactants
(C) is always less than
(D) only if the number of moles of the products is less than the number of moles of the reactantsCorrect

Answer: (D)

, so only when , i.e. products have fewer

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Question ID VK-064555