Chemistry - Chemical Equilibrium Question with Solution | TestHub

$\mathrm{\Delta }\mathrm{H}=({\mathrm{E}}_{\mathrm{a}}{)}_{\mathrm{ƒ}}–({\mathrm{E}}_{\mathrm{a}}{)}_{\mathrm{b}}$
$5=10–({\mathrm{E}}_{\mathrm{a}}{)}_{\mathrm{b}}$
${{\text{(E}}_{\text{a}}\text{)}}_{\text{b}}=5\text{ kJ/mol}\text{.}$
$({\mathrm{E}}_{\mathrm{a}}{)}_{\mathrm{ƒ}}>({\mathrm{E}}_{\mathrm{a}}{)}_{\mathrm{b}}$hence option$\left(\mathrm{B}\right)$is correct