Chemistry - Chemical Kinetics Question with Solution | TestHub

We know that

$∆\mathrm{H}={\left({\mathrm{E}}_{\mathrm{a}}\right)}_{\mathrm{forward}}-{\left({\mathrm{E}}_{\mathrm{a}}\right)}_{\mathrm{backward}}$

If the activation energies of both forward and backward reactions are the same, then $∆\mathrm{H}=0$.

We can't comment anything about $∆\mathrm{G}$, catalyst or order of reaction till we have any other supporting data.