Explanation
Collision frequency
Positive Activation energy is always Positive
Slow
an increase in the number of activated molecules
Threshold Energy – Energy of the reactants
Bimolecular
Ef < Er
more than ∆H
lo Kcal mole-1 ∆H = Ea - Ear ∴ +5 = 15 - Ear ∴ Ear =10
Activation energy and frequency factor.
512 Increases of temperature n ×10 Increases reaction rate = 29 ∆T = 100 – 10 = 90 = 9 ×10 ∴ n = 9 ∴ Increases reaction rate = 29 = 512
1 The rate is not depend upon the reactant present in excess
K = 100
2n = 4 3n =9 ∴ n = 2
increase four times
Rate =K[A]2 ∴ rate =K[2A]2 = 4.K[A]2
third order
Order of reaction is decided by the mechanism of the reaction and concent of reactants.
For zero Order reaction, rate of reaction is
Independent of concentration of reactants.
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