What is the activation energy of a reverse reaction?
Correct answer: C. x + y
- A. x
- B. x - y
- C. x + y
- D. y
Explanation
The difference in energy between products and reactants is x, and the activation energy for the reactants is y; therefore, in the reverse reaction where the products serve as reactants, the activation energy will be x+y.
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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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