One mole of gas is heated with 1.75 kJ of energy; it expands doing 250 J of work. Calculate the change in internal energy of the gas.

Question

Quizplus · Accepted Answer

The change in internal energy (ΔU) is given by the first law of thermodynamics: ΔU = Q - W, where Q is the heat added to the system and W is the work done by the system. Here, Q = 1.75 kJ = 1750 J and W = 250 J. Therefore, ΔU = 1750 J - 250 J = 1500 J.

One Mole of Gas Is Heated with 1