posted by John on .
Consider the cracking of gaseous ammonia at constant total pressure of 1 atm and constant temperature. Find the equilibrium gas composition at 400 degree C.
The Gibbs free energy for the cracking reaction
2NH3 = N2 + 3H2,
DeltaGo ( delta G standard) =87,030-25.8TlnT –31.7T, J
Answer: PH2 = 0.7465 atm, PN2 = 0.2488 atm, PNH3 = 0.0047 atm
I obtained 0.2488 atm for pN2 and stopped there.