Following figure shows two processes A and B for a gas. If ΔQA and ΔQB are the amount of heat absorbed by the system in two cases, and ΔUA and ΔUB are changes in internal energies, respectively, then :
(1) ΔQA > ΔQB, UA > ΔUB
(2) ΔQA <ΔQB, ΔUA < ΔUB
(3) ΔQA > ΔQB, ΔUA = ΔUB
(4) ΔQA = ΔQB ; ΔUA = ΔUB
