Consider a reaction aG+bH→products. When concentration of both the reactants G and H is doubled, the rate increases by eight times.However, when the concentration of G is doubled keeping the concentration of H fixed, the rate is doubled .The overall order of the reaction is ______?

aG+bH→ products. The rate is directly proportional to [G]m[H]nWhen concentration of both the reactants is doubled then,Rate =[2G]m[2H]n=2m2n[G][H]Then the rate increases eight times which means either m = 2 then n = 1 or n = 2 and m = 1.Again, it is given that when the concentration of G is doubled then rate is doubled which means that m = 1 and n = 2 .And the overall order is m = n = 2 = 1 =3.