Chapter DY, Problem 4PQ

Interpretation Introduction

Interpretation:

From the given diagrams in the question statement, the one which represents a reaction in which activation energy, ${\text{E}}_{\text{a}}$ is ${\text{50kJ/mol}}^{\text{-1}}$ and the ${\text{ΔH}}_{\text{reaction}}$ is $\text{-15kJ/mol}$ has to be given.

Concept Introduction:

Activation energy – it is the minimum amount of energy required for the activation of atoms or molecules undergoing chemical transformation or physical transport.  In a reaction to yield products from reactants, certain amount of energy is needed that is the activation energy.  If the enthalpy of products is lower than the reactants, then the enthalpy of reaction is negative and vice versa.

Enthalpy of reaction is calculated using the equation:

    ${\text{Enthalpy of reaction = E}}_{\text{forward}}{\text{-E}}_{\text{backward}}$