alleryWork done in an isothermal process for ideal gas:
AW = nR ΔT
BW = PΔV
CW = nRT ln(Vf/Vi)
DW = ΔU
Answer & Solution
Correct answer: C. W = nRT ln(Vf/Vi)
**Isothermal:** T constant.
W = ∫P dV = ∫(nRT/V) dV = nRT ln(Vf/Vi).
For expansion (Vf > Vi), W is positive.
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