Question #2a9e4

Aug 31, 2016

THE REACTION IS CALLED ENDOTHERMIC REACTION

Explanation:

https://socratic.org/s/axvZR3EF

This figure is obtained from the link given above.In this link concept of activation energy has been explained in detail.

Let

$\text{Thresold Energy of Reaction } = {E}_{t}$

$\text{Average Energy of Reatants } = {E}_{r}$

$\text{Average Energy of Products } = {E}_{p}$

$\text{Activation Energy of Forward Reactin} = {E}_{a}^{f}$

$\text{Activation Energy of Backward Reactin} = {E}_{a}^{b}$

So

${E}_{a}^{f} = {E}_{t} - {E}_{r}$

${E}_{a}^{b} = {E}_{t} - {E}_{p}$

Now

$\text{Heat of reaction } \Delta H = {E}_{p} - {E}_{r}$

Again given cindition is

${E}_{a}^{f} > {E}_{a}^{b}$

$\implies {E}_{t} - {E}_{r} > {E}_{t} - {E}_{p}$

$\implies {E}_{p} - {E}_{r} > 0$

$\implies \Delta H > 0 \textcolor{red}{\to \text{Means the reaction is endothermic}}$