Problem: A reaction has a standard free-energy change of -13.50 KJ mol-1 (-3.227 kcal mol-1). Calculate the equilibrium constant for the reaction at 25 degrees Celsius. 

FREE Expert Solution

We’re being asked to determine the equilibrium constant (K) at 25 ˚C for the reaction with ΔG of -13.50 KJ mol-1.


Recall that ΔG˚rxn and K are related to each other:


ΔG°rxn=-RTlnK


Step 1: We first need to convert ΔH˚ from kJ to J:


ΔG°rxn=-13.50 kJmol×103 J1 kJ

ΔG˚rxn = – 13500 J/mol


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Problem Details

A reaction has a standard free-energy change of -13.50 KJ mol-1 (-3.227 kcal mol-1). Calculate the equilibrium constant for the reaction at 25 degrees Celsius. 

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