Practice question
Question
Calculate the work done when 2 mol of an ideal gas expands isothermally and reversibly from 8 L to 24 L at 400 K. (R = 8.314 J/mol·K)
Explanation
w = -nRT ln(V₂/V₁) = -2 × 8.314 × 400 × ln(24/8) = -6651.2 × ln(3) = -6651.2 × 1.099 = -7309.7 J.