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### Topic: arrenhius activation energy ratio?? pls help  (Read 3418 times)

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##### arrenhius activation energy ratio?? pls help
« on: July 19, 2010, 12:22:27 PM »
In benzene solution, triethylamine, (C2H5)3N, reacts with bromoethane, C2H5Br, according to the following time-independent stoichiometric equation:

(C2H5)3N + C2H5Br = (C2H5)4N+Br−

If the ratio of the experimental rate constants at 333 K and 320 K (that is,
kR(333 K)/kR(320 K)) is equal to 2.0, use this information to estimate the Arrhenius activation energy for the reaction.

choices are:

136 kJ mol−1
21 kJ mol−1
75 kJ mol−1
47 kJ mol−1
93 kJ mol−1

any help is appretiated.

#### sjb

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##### Re: arrenhius activation energy ratio?? pls help
« Reply #1 on: July 19, 2010, 01:23:51 PM »
What equations do you know that relate activation energy to temperature and / or rate of reaction?