What is the measure of activation energy in an endothermic reaction?
Correct answer: A. The energy of activation of backward reaction is less than that of forward reaction
- A. The energy of activation of backward reaction is less than that of forward reaction
- B. The energy of activation of backward reaction is more that that of forward reaction
- C. The energy of activation of forward reaction is less than that of backward reaction
- D. The energy of activation of forward - backward reaction is same
Explanation
In an endothermic reaction, the activation energy of a forward reaction will always be greater than that of the reverse reaction as can be seen in the diagram given above so, the answer is A which is the activation energy of the reverse reaction being less than that of the forward reaction.Options B and C describe the conditions of an exothermic reaction.Option D would describe a reaction in which the products and reactants are at the same energy level.
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About Thermochemistry and Energetics of Chemical Reactions
Thermochemistry measures energy changes in chemical reactions and distinguishes exothermic from endothermic processes. Work covers systems, surroundings and state functions, internal energy, the first law of thermodynamics, enthalpy and Hess's law, including the sign conventions used when heat enters or leaves a system.
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