Question

One mole of an ideal diatomic gas undergoes a transition from A to B along a path AB as shown in (figure). The change in internal energy of the gas during the transition is `(gamma=3//5)`

A. `20kJ`
B. `-20kJ`
C. `20J`
D. `-12kJ`

Answer 1

Correct Answer - B
The change in internal energy of the gas
`DeltaU=(P_(2)V_(2)-P_(1)V_(1))/(gamma-1)=(2xx6-4xx5)/(7/5-1) = -20kJ`.