Internal Energy
Is the formula of n.Cvm.deltaT always valid for delta U?
Coz this is at const. volume, but in the actual ques. vol. is changing.
Coz this is at const. volume, but in the actual ques. vol. is changing.

+solved @user1 @user2... to close the thread when your doubt is solved. Mention the users who helped you solve the doubt. This will be added to their stats.+solved @user1 @user2...