Question

The delta E of a system that absorbs 12.4 J of heat and does 4.2 J of work on the surroundings is

A. 16.6
B. 4.2
C. -16.6
D. 12.4
E. 8.2

Answer 1

The net change in internal energy of the system is E) 8.2 J.

Step-by-step explanation:

The net change in internal energy of a system can be calculated by subtracting the work done on the system from the heat absorbed by the system.

In this case, the system absorbs 12.4 J of heat and does 4.2 J of work on the surroundings.

Therefore, the net change in internal energy is the difference between these values:

Net change in internal energy = Heat absorbed - Work done

Net change in internal energy = 12.4 J - 4.2 J

= 8.2 J