Question

the work done on the system is going from A to B to C is 50 J and 20 cal heat is given to the system. the change in internal energy between A and C is

Answer 1

Answer:

70 J

Explanation:

work done on the system so

dW= -50J ,and dQ is = 20 J

according to first law of thermodynamics dQ=dW+dU

dU=20-(-50)=70 J