An ideal gas goes from state A to state B via three different processes as indicated in the P-V diagram -
A 1
2
3 B
P
V
If Q1, Q2, Q3 indicate the heat absorbed by the gas along the three processes and ∆U1, ∆U2, ∆U3 indicate the
change in internal energy along the three processes respectively, then -
(1) Q3 > Q2 > Q1 and ∆U1 = ∆U2 = ∆U3 (2) Q1 = Q2 = Q3 and ∆U1 > ∆U2 > ∆U3
(3) Q3 > Q2 > Q1 and ∆U1 > ∆U2 > ∆U3 (4) Q1 > Q2 > Q3 and ∆U1 = ∆U2 = ∆U
