Homework Help: Physics

Posted by Anonymous on Tuesday, February 5, 2013 at 10:51pm.

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 256 to 297 oC? (The factor is the ratio of the rates.)

A catalyst decreases the activation energy of a particular exothermic reaction by 60 kJ/mol, to 27 kJ/mol. Assuming that the mechanism has only one step, and that the products are 46 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?

So I'm not sure how to do either of the questions. I've looked through my notes and the book, but I still can't get it. Thanks in advance!

Chemistry - Devron, Wednesday, February 6, 2013 at 5:14am
You are going to have to search graphs that depict the energy of activation with and without a catalyst for you to understand how to sketch the graphs.
Physics - Anonymous, Wednesday, February 6, 2013 at 1:38pm
Is it necessary to graph it?
Chemistry - Devron, Wednesday, February 6, 2013 at 8:30pm
To understand how to sketch it, yes.
Chemistry - Devron, Wednesday, February 6, 2013 at 8:36pm
To do the first part, I believe ou have to use Arrhenius equation

ln(k2/k1) = Ea/R(1/T1 - 1/T2)

Answer this Question

Related Questions

chemistry - The given reaction, cyclopropane propene (isomerization), follows ...
chemistry - The reaction, cyclopropane propene (isomerization), was observed to ...
Chemistry - The reaction for the decomposition of dinitrogen monoxide gas to ...
chemistry - The activation energy for the reaction in which CO2 decomposes to CO...
Physical Chemistry - The presence of a catalyst provides a reaction pathway in ...
chemistry - A reaction rate increases by a factor of 815 in the presence of a ...
ap chemisrty - When heated, cyclopropane is converted to propene. Rate constants...
Chemistry - The standard free energy of activation of a reaction A is 88.6 kJ ...
Chemistry - The standard free energy of activation of one reaction is 94.3 kj/...
Chemistry - For a one step reaction, the activation energy for the forward ...

For Further Reading

First Name:
School Subject:
Answer: