A gas expands at a constant pressure of 2.0 × 10⁵ Pa from 1.5 L to 4.0 L. How much work does the gas do?
Correct answer B. 500 J
Explanation
W = PΔV = 2.0 × 10⁵ × (4.0 − 1.5) × 10⁻³ m³ = 500 J. Forgetting to convert litres to cubic metres gives 5.0 × 10⁵ J.
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