The incorrect expression among the following is: - Chemistry MCQ AIEEE 2012 2026 | ExamTest.live | ExamTest.live

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The incorrect expression among the following is:

A $Δ S_{total} = - \frac{Δ G _{system}}{T}$
B $In isothermal process w_{reversible} = - n RT ln \frac{V _{f}}{V _{i}}$
C $ln K = \frac{Δ H ^{\circ} - T Δ S ^{\circ}}{RT}$
D $K = e^{- Δ G^{\circ} / RT}$

Solution & Step-by-step Explanation

Option C is incorrect.We know Δ G^{\circ} = Δ H^{\circ} - T Δ S^{\circ} .Also Δ G^{\circ} = - RT ln K .So, - RT ln K = Δ H^{\circ} - T Δ S^{\circ} ⟹ ln K = \frac{- ( Δ H ^{\circ} - T Δ S ^{\circ} )}{RT} .Option C missing the negative sign.

Practice this question

Try it yourself before checking the explanation above.

The incorrect expression among the following is:

A

Δ S_{total} = - \frac{Δ G _{system}}{T}

B

In isothermal process w_{reversible} = - n RT ln \frac{V _{f}}{V _{i}}

C

ln K = \frac{Δ H ^{\circ} - T Δ S ^{\circ}}{RT}

D

K = e^{- Δ G^{\circ} / RT}

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Thermodynamics Chemical Equilibrium

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