Q.
A system is taken from state A to state B along two different paths 1 and 2. The heat absorbed and work done by the system along these two paths are Q1 and Q2, and W1 and W2 respectively. Then
A system is taken from state A to state B along 2 different paths 1 and 2 . The heat absorbed and work done by the system along these 2 paths are Q1,Q2 and W1,W2
By first law of thermodynamics <br/>Q1+(−W1)=Q2+(−W2)<br/>
Hence Q1−W1=Q2−W2 is correct.