Question

An ideal gas is taken through the cycle A → B → C → A, as shown in figure. If the net heat supplied to the gas in the cycle is 5 J the work done by the gas in the process A → B is

(a) 2 J

(b) 3 J

(c) 4 J

(d) 5 J

Answer 1

Correct option (b) 3 J

Explanation :

Process B → C occurs at constant volume Hence, W_BC = 0 

Process C → A occurs at constant process. Hence the work done in the process is

For a cyclic process, ΔU = 0

According to the first law of thermodynamics