Question

Write the suitable name of $\left(X\right)$ and $\left(Y\right)$ denoted in above graph:

Answer 1

(X) represents the activation energy $Ea$ of a reaction is a barrier that must be overcome for the reactants to become products.

(Y) represents the enthalpy change $\Delta H_{rxn}$ of the reaction.It is the difference between the enthalpies of products and enthalpies of reactants.

$\left(X\right)=E_a$
$\left(Y\right)=\Delta H_{rxn}$