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Question

Which of the following expressions are correct to express reaction quotient/equilibrium constant of a reaction?

A
K=eΔrH/RT×eΔrS/RT
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B
ΔrG=RTlnK
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C
ΔG=ΔGo+RTlnQ
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D
Equilibrium constant K is dimension less in terms of relative activity
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Solution

The correct options are
A K=eΔrH/RT×eΔrS/RT
B ΔrG=RTlnK
C ΔG=ΔGo+RTlnQ
D Equilibrium constant K is dimension less in terms of relative activity
K=eΔrG/RT----------------(1)

Put G=HTS, we get

K=eΔrH/RT×eΔrS/RT

From equation can also be written as,

ΔrG=RTlnK

ΔG=ΔGo+RTlnQ is a general formula involving reaction quotient.

Equilibrium constant K is dimensionless in terms of relative activity

Hence, all options are true

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