• # question_answer When heat is given to a gas in an isothermal change, the result will be            A) External work done                     B) Rise in temperature C) Increase in internal energy D) External work done and also rise in temp.

Correct Answer: A

Solution :

 [a] In isothermal change, temperature remains constant, Hence DU = 0. Also from  $\Delta Q=\Delta U+\Delta W$ Þ $\Delta Q=\Delta W$

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