Medium MCQ +4 / -1 PYQ · JEE Mains 2021

The incorrect expression among the following is :

A ${{\Delta {G_{System}}} \over {\Delta {S_{Total}}}} = - T$ (at constant P)
B $K = {{\Delta H^\circ - T\Delta S^\circ } \over {RT}}$ Correct answer
C $K = {e^{ - \Delta G^\circ /RT}}$
D For isothermal process ${w_{reversible}} = - nRT\ln {{{V_f}} \over {{V_i}}}$

Solution

Option (b) is incorrect. $\Delta$G$^\circ$ = $-$RT ln K $\Delta$H$^\circ$ $-$ T$\Delta$S$^\circ$ = $-$RT ln K ln K = $\left[ {{{\Delta H^\circ - \Delta S^\circ } \over {RT}}} \right]$

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Subject: Chemistry · Chapter: Thermodynamics · Topic: Zeroth and First Law

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The incorrect expression among the following is :

Solution

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