Work Done by Gas at Constant Pressure (ΔW = P ΔV)
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ΔW = P ΔV
What each symbol means
| Symbol | What it stands for |
|---|---|
| P | Constant external pressure (Pa) |
| ΔV | Change in volume of gas (m³) |
| ΔW | Work done by gas (J) |
When to use this
Valid only when pressure remains constant during the process. Applies to gas in cylinder with movable piston working against constant external pressure.