We can express the work in terms of:
Correct answer: C. P∆V
- A. P∆U
- B. P∆A
- C. P∆V
- D. All are correct
Explanation
P∆V is the correct expression for work done by gas because it represents the amount of energy required to move the piston against the external pressure. When a gas expands, the piston moves outward, and the external pressure must be overcome in order for the gas to expand. The work done by the gas is equal to the product of the external pressure and the change in volume.
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About Work
Work is done when a force produces displacement, with its value determined by the component of force along the displacement. The topic covers positive, negative and zero work, work by variable forces from force-displacement graphs, and the connection between net work and change in kinetic energy.
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