Question

If a system expands in a volume by an amount AV (m³) against a constant restraining pressure (N / m²), a quantity PAV (J) is transferred as expansion work from the system to its surroundings. Suppose that the following four conditions are satisfied for a closed system: the system expands against a constant pressure (so that AP = 0), AEK = 0, AEp = 0, and the only work done by or on the system is expansion work. Prove that under these conditions. The energy balance simplifies to Q = AH.​

Answer 1

Answer:

If a system expands in a volume by an amount AV (m³) against a constant restraining pressure (N / m²), a quantity PAV (J) is transferred as expansion work from the system to its surroundings. Suppose that the following four conditions are satisfied for a closed system: the system expands against a constant pressure (so that AP = 0), AEK = 0, AEp = 0, and the only work done by or on the system is expansion work. Prove that under these conditions. The energy balance simplifies to Q = AH.