Problem

Calculate K for the reaction between glutamate and ammonia. (The standard free energy change for the reaction is +14.2 kJ/mol. Assume a temperature of 298 K.)

Solution

We’re being asked to determine the **equilibrium constant (K)** of a reaction between glutamate and ammonia

Recall that ** ΔG˚_{rxn} and K** are related to each other:

$\overline{){\mathbf{\Delta G}}{{\mathbf{\xb0}}}_{{\mathbf{rxn}}}{\mathbf{=}}{\mathbf{-}}{\mathbf{RTlnK}}}$

where:

*ΔG˚ _{rxn }is the standard free energy change*

*R is the universal gas constant*

*T is the temperature*

*K is the equilibrium constant*

Gibbs Free Energy