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25/09/2021 3:29 pm
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Which of the following statements/relationships is not correct in thermodynamic changes?
(a) ΔU = 0 (isothermal reversible expansion of a gas)
(b) w = -nRT ln V2/V1 (isothermal reversible expansion of an ideal gas)
(c) w = nRT ln 2/V1 (isothermal reversible expansion of an ideal gas)
(d) For a system of constant volume heat involved directly changes to internal energy
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25/09/2021 3:31 pm
Correct answer: (c) w = nRT ln 2/V1 (isothermal reversible expansion of an ideal gas)
Explanation:
For isothermal reversible expansion.
w = -nRT ln \(\frac{V_2}{V_1}\)