On a pressure–volume graph, the work done by a gas during an expansion is equal to ____.
Correct answer B. the area under the curve between the initial and final volumes
Explanation
Work W = ∫P dV, which is the area between the P–V curve and the volume axis. Since different paths enclose different areas, work depends on the path taken, not just the end states.
Answer checked How we write and check questions
Discussion