Given :
Change in internal energy is, ΔE = 10 J.
Heat transferred to the system is, Q = 10 J.
To Find :
The work done by the system.
Solution :
We know, by 1st law of thermodynamics :
ΔE = W + Q
W = ΔE - Q
W = 10 - 10 J
W = 0 J
Therefore, work done by the system is 0 J.