Same chapter3 marksDifficulty: Medium
A Carnot engine works between 500 K and 300 K. Find its efficiency.
Heat and Thermodynamics
3 marksDifficulty: Medium
Calculate the work done when one mole of an ideal gas expands isothermally and reversibly from 10 L to 20 L at 300 K. Take R = 8.31 J mol−1 K−1.
Original Khojo Papers practice question — not from a past board paper.
Answer
About 1,727 J
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
W = nRT ln(V2/V1) = 1 × 8.31 × 300 × ln 2 = 2,493 × 0.693 ≈ 1,727 J.
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