What is the yield of the synthesis of ammonia to 400° C and 500 atm of pressure?
There are fewer molecules of gas on the right-hand side of the chemical equation than there are on the left hand side:
N2(g) + 3H2(g) Equilibrium symbol2NH3(g)
If the pressure is increased, the reaction that produces the least number of molecules of gas is favoured. This means that the equilibrium yield of ammonia is increased if the pressure is increased.