Question

Initial volume of 1 mole of a monoatomic gas is 2 litres. It is expanded isothermally to a volume of 6 litres. Change in internal energy is xR. Find x.

Answer 1

The correct answer is 0.
∆U = nCV∆T
= nCV(0) ($\because$ isothermal)
⇒ ∆U = 0