For an endothermic reaction, H represents the enthalpy of reaction. The minimum value for the energy for activation will?
Correct answer: B. More than delta H
- A. Equal to delta H
- B. More than delta H
- C. Less than delta H
- D. Zero
Explanation
For an endothermic reaction, the enthalpy of reaction (ΔH) is positive, indicating that energy is absorbed during the reaction. The activation energy (Ea) is the minimum energy required for the reaction to occur.Since the reaction is endothermic, the activation energy must be greater than the enthalpy of reaction (ΔH) to ensure that the reaction can proceed. This is because the system needs to overcome the energy barrier (Ea) to absorb the energy (ΔH) required for the reaction.
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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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