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Consider a reaction $a G+b H \rightarrow$ products. When concentration of both the reactants $G$ and $H$ is doubled, the rate increases by eight times. However, when concentration of $G$ is doubled keeping the concentration of $H$ fixed, the rate is doubled. The overall order of the reaction is
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3
3
$a G+b H \longrightarrow$ Product
Suppose order of reaction $=n$
When concentration of both $G$ and $H$ is double than rate increase by eight times.
$$
\begin{aligned}
\text { rate } & =k(\text { reactants })^n \\
(2)^8 & =k(2)^n \\
(2)^3 & =k(2)^n \\
n & =3
\end{aligned}
$$
when concentration of $G$ is doubled than concentration $H$ is fixed, the rate is double.
than $\quad$ rate $\propto[G]^1[H]^2$
Suppose order of reaction $=n$
When concentration of both $G$ and $H$ is double than rate increase by eight times.
$$
\begin{aligned}
\text { rate } & =k(\text { reactants })^n \\
(2)^8 & =k(2)^n \\
(2)^3 & =k(2)^n \\
n & =3
\end{aligned}
$$
when concentration of $G$ is doubled than concentration $H$ is fixed, the rate is double.
than $\quad$ rate $\propto[G]^1[H]^2$
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