NEET2010ChemistryChemical KineticsActual
For an endothermic reaction, energy of activation is E_a and enthalpy of reaction is H (both of these in kJ / mol ). Minimum value of E_a will be
Options
- Aless than H
- Bequal to H
- Cmore than H
- Dequal to zero
Correct answer
C. more than H
Step-by-step solution
Key Idea In endothermic reactions, energy of reactants is less than that of the products. Potential energy diagram for endothermic reactions is, where, E _ a = activation energy of forward reaction E _ a ^ = activation energy of backward reaction H = enthalpy of the reaction From the above diagram, E _ a = E _ a ^ + H Thus, E _ a > H