A) \[\Delta U=0\](isothermal reversible expansion of a gas)
B) \[w=-nRT\ln \frac{{{V}_{2}}}{{{V}_{1}}}\](isothermal reversible expansion of an ideal gas)
C) \[w=-nRT\ln \frac{{{V}_{2}}}{{{V}_{1}}}\](isothermal reversible expansion of an ideal gas)
D) For a system of constant volume heat involved directly changes to internal energy.
Correct Answer: C
Solution :
For isothermal reversible expansion. \[w=-nRT\ln \frac{{{V}_{2}}}{V}\]
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