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Chemistry Forums for Students => Physical Chemistry Forum => Topic started by: abadir16 on July 19, 2010, 12:22:27 PM

Title: arrenhius activation energy ratio?? pls help
Post by: abadir16 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.

Title: Re: arrenhius activation energy ratio?? pls help
Post by: sjb on July 19, 2010, 01:23:51 PM

What equations do you know that relate activation energy to temperature and / or rate of reaction?