Question

An exothermic chemical reaction proceeds by two stages reactants `overset("Stage I")(rarr) "intermdediate" overset("Stage II")(rarr)` products, The activation energy of stage `I` is `50 kJ mol^(-1)`. The overall enthalpy change of the reaction is `-100 "kJ mol"^(-1)`. Which diagram could represent the energy level diagram for the reaction ?
A.
B.
C.
D.

Answer 1

Correct Answer - C

Diagram (c ) represents exothermic reaction with `E_(a) = 200 - 150 - 50 kJ mol^(-1)` and `Delta = 50 - 150 = - 100 kJ mol^(-1)`