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At 300 K, the equilibrium constant for a...

At 300 K, the equilibrium constant for a reaction is 10. the standard free energy change (in kJ `mol^(-1)` ) for the reaction is

A

`-57.4`

B

`-115.2`

C

`+ 57.4`

D

`-5.74`

Text Solution

Verified by Experts

The correct Answer is:
D
From Gibbs free energy equation.
`Delta G = - 2.303 ` RT log K
Given , K = 10, T = 300 K
R = 8.314 J/K/mol
`therefore Delta`G - `2.303 xx 8.3 14 ` J/mol 300 k
`[ because log 10 = 1 ] `
`Delta`G = - 5744.14 J/mol , `Delta`G = - 5.74 KJ/mol
Thus, option (d) is correct.
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