For a chemical reaction A -> B, the threshold energy of the reaction is 37 kJ/mole. The average internal energy of A is 12 kJ/Mole. What will be the activation energy of A?
Correct answer: C. 25 KJ/Mole
- A. 43 K.J/Mole
- B. 37 K.J/Mole
- C. 25 KJ/Mole
- D. 19 K.J/Mole
Explanation
Since the initial internal energy of reactants in already 12KJ/mol.Threshold energy for reaction to proceed is 37kJ/mol.That means the activation energy required to reach the threshold value is 37-12=25kJ/mol.
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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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