<Li> Reversed Haber process: 2 NH 3 (g) ⟶ 3 H 2 (g) + N 2 (g) (\ displaystyle (\ ce (2NH3 (g) -> (3H2 (g)) + (N2 (g))))) </Li> <P> The order of a reaction cannot be deduced from the chemical equation of the reaction . </P> <P> A first order reaction depends on the concentration of only one reactant (a unimolecular reaction). Other reactants can be present, but each will be zero order . The rate law for a reaction that is first order with respect to a reactant A is </P> <Dl> <Dd> − d (A) d t = r = k (A) (\ displaystyle (\ frac (- d ((\ ce (A)))) (dt)) = r = k ((\ ce (A)))) </Dd> </Dl>

Rate constant of first order reaction depends on