WAEC - Chemistry (2007 - No. 22)
Consider the reaction represented by the following equation: N2(g) + 3H2(g) ⇌ 2NH3(g); ∆H = - 92kJmol1. Finely divided iron is used as catalyst in the reaction in order to
lower the value of ∆H
increase the time for attainment of equilibrium
shorten the time for attainment of equilibrium
decrease the yield of ammonia