The heat absorbed by a system at constant pressure is equal to ΔU + PΔV.

Question

Quizplus · Accepted Answer

This statement is a variation of the first law of thermodynamics, which states that the change in internal energy (ΔU) of a system equals the heat (q) added to the system minus the work (w) done by the system: ΔU = q - w. If the pressure is constant (PΔV = w), then we can rearrange the equation to get q = ΔU + PΔV. Therefore, the statement is true.

The Heat Absorbed by a System at Constant Pressure Is