Threshold energy = Ea + average kinetic energy of reactants. If Ea = 50 kJ/mol and avg KE = 4 kJ/mol, threshold energy:
A50
B54
C46
D100
Answer & Solution
Correct answer: B. 54
Threshold = Ea + average kinetic energy ≈ 54 kJ/mol. (Ea is the EXCESS energy over the average needed to react.)
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