Question

The Haber process is used to synthesize ammonia (NH3) from N2 and H2. The change in standard Gibbs free
energy is ΔG°rxn = -16 kJ/mol

A. Calculate the equilibrium constant for this reaction

B. Calculate the ΔGrxn when you have 2 atm of NH3 (g), 2 atm of H2 (g), and 0.5 atm of N2 (g). What
direction must the reaction proceed to reach equilibrium?

Answer 1

a)
dGorxn = -RTlnK
Solve for K. Remember dG is in Joules, R is 8.314, T in kelvin.

b) If you mean dG, then go with the below.
dG = dGo + RTlnQ