MHT CET 2025 Chemistry question

Calculate the change in internal energy of the system if 20 kJ work is done on the system and it releases 10kJ heat in a particular reaction

(A)20 kJ
(B)40 kJ
(C)10 kJCorrect
(D)30 kJ

Answer: (C)

Solution

First law of thermodynamics: (work done on the system is positive; heat absorbed by the system is positive). Work done on the system: kJ. Heat released by the system:

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Question ID VK-102089