Question

Assertion :When an ideal gas is taken from a given thermodynamics state $A$ to another given thermodynamic state $B$ by any polytropic process, the change in the internal energy of the system will be the same in all processes. Reason: Internal energy of the gas depends only upon its absolute temperature.

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Both Assertion and Reason are incorrect

Answer 1

The correct option is C Assertion is correct but Reason is incorrect

Internal energy being a state function, its change depends only on initial and final states and so is the same for all polytropic processes between states A and B$\Rightarrow$ assertion is correct

Change in internal energy and not internal energy depends solely on absolute temperature.

Hence, reasoning is incorrect.