Question

What is the change in internal energy if 50 J of heat are released from a system, and the system does 80 J of work on its surroundings?

Answer 1

Change in the internal energy of the system= -130 J

Step-by-step explanation:

Heat released= Q=-50 j

Work=80 J

we use the first law of thermodynamics

Q= ΔU + W

-50 = ΔU +80

ΔU =-130 J