Correct Answer - Option 4 : 1 kJ
Concept:
The work done by the air at constant pressure is given as,
W = PΔV
Calculation:
Given:
P1 = P2 = 100 kPa, V1 = 10 ltr = 10 × 10-3 m3, V2 = 20 ltr = 20 × 10-3 m3, T1 = 2°C = 275 K
As P2 = P1 (as pressure is constant)
∴ Work = PdV = 100 × 103 (20 – 10) × 10-3
= 1000 J = 1 KJ