Question

A system absorb 600 J of heat and work equivalent to 300 J on its surroundings. The change in internal energy is
A. 300 J
B. 400 J
C. 500 J
D. 600 J

Answer 1

Correct Answer - A
We know that `DeltaE=Q+W=600+(-300)=300 J`
W=300, because the work done by the system.