Question

One mole of an ideal gas is taken from state A to state B by three different processes -

(1) ACB, (2) ADB and (3) AEB as shown in the P–V diagram. The heat absorbed by the gas is

• A. Greater in process (2) then in (1)
• B. The least in process (2)
• C. The same in (1) and (3)
• D. Less in (3) then in (2)

Answer 1

Answer: (D)

Less in (3) then in (2)

Answer 2

Heat absorbed by the gas in three processes.

Q_ACB = DU + W_ACB

Q_ADB = DU

Q_AEB = DU + W_AEB

Q_ACB > Q_ADB > Q_AEB