a)The activation energy for the isomerization ol cyclopropane to propene is 274

Question

a)The activation energy for the isomerization ol cyclopropane to propene is 274 kJ/mol. By what factor does the rate of this reaction increase as the temperature rises from 232 to 281 oC? (The factor is the ratio of the rates.)

b)A catalyst decreases the activation energy of a particular exothermic reaction by 38 kJ/mol, to 56 kJ/mol. Assuming that the mechanism has only one step, and that the products are 47 kJ lower in energy than the reactants, sketch approximate energy-level diagrams for the catalyzed and uncatalyzed reactions.

What is the activation energy for the uncatalyzed reverse reaction?

Explanation / Answer

1) for every 10^0 crise in temp. the rate of reactioncan become double

as the temp. rises from 232 to 281 that means it has increased by 50 ^0c

so rate of reaction increases 10 times& rate constant also increased by 10 times

2)in presence of catalyst rate of reaction is more as activation energy is less

in absence of catalyst rate of reaction is slow as activation energy is more

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