An exothermic chemical reaction proceeds by two stages. Reactants xrightarrow textStage 1 Intermediate xrightarrow textStage 2 Products The activation energy of state I is 50 kJ mol-1. The overall enthalpy change for the reaction is -100 kJ mol-1. Which diagram could represent the energy level diagram for the reaction?

Question

An exothermic chemical reaction proceeds by two stages. Reactants xrightarrow textStage 1 Intermediate xrightarrow textStage 2 Products The activation energy of state I is 50 kJ mol-1. The overall enthalpy change for the reaction is -100 kJ mol-1. Which diagram could represent the energy level diagram for the reaction? (A)  (B)  (C)  (D)

Tardigrade Admin · Accepted Answer

<img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/physics/1598b57f79687f08a0306eff0525f928-.png" /> Diagram (c) represents exothermic reaction with Ea =200-150=50 kJ mol-1 and Δ H =50-150=-100 kJ mol-1

Q. An exothermic chemical reaction proceeds by two stages. Reactants Stage1​ Intermediate Stage2​ Products The activation energy of state I is 50kJ mol−1. The overall enthalpy change for the reaction is −100kJ mol−1. Which diagram could represent the energy level diagram for the reaction?

Diagram (c) represents exothermic reaction with Ea​ =200−150=50kJ mol−1 and ΔH =50−150=−100kJ mol−1

Diagram $(c)$ represents exothermic reaction with
$E_{a}$ $= 200 - 150 = 50 k J$ $m o l^{- 1}$ and
$Δ H$ $= 50 - 150 = - 100 k J$ $m o l^{- 1}$