Question

. A cylinder and piston assembly is warmed by an external flame. As a result, the system absorbs 559 J of heat. The contents of the cylinder expand and perform 488 J of work during the expansion. What is the change in internal energy of the system?

Answer 1

U = 71 J

Step-by-step explanation:

given,

system absorb heat = 559 J

Work done during expansion = 488 J

First law of thermodynamics state that energy can neither be created nor be destroyed.

Apply First law of thermodynamics:

Q - H = U

where

Q = +559 J

W = 488 J

U = Q - H

U = 559 - 488

U = 71 J

The change in internal energy is equal to U = 71 J