A gas absorbs 0.0 J of heat and then performs 30.7 J of work.The change in internal energy of the gas is

Question

Quizplus · Accepted Answer

The first law of thermodynamics states that the change in internal energy of a system is equal to the heat added to the system minus the work done by the system:

ΔU = Q - W

In this case, Q (heat added) is 0.0 J and W (work done) is 30.7 J. Therefore:

ΔU = 0.0 J - 30.7 J = -30.7 J

The negative sign indicates that the internal energy of the gas has decreased. So, the best choice is D.

A Gas Absorbs 0