Practice question
Question
Calculate the work done when 1 mol of an ideal gas expands reversibly and isothermally from 10 atm to 2 atm at 300 K. ( R = 8.314 J/mol·K )
Explanation
For reversible isothermal expansion, w = -nRT ln(P₁/P₂) = -1 × 8.314 × 300 × ln(10/2) = -2494.2 × 1.6094 ≈ -4013 J .
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