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I've been trying to work this out and didn't quite succeed, so I'm hoping someone might help me out a bit.

I've been using the Arrhenius equation to calculate reaction rates at 2 temperatures, so I took the integral and got k2/k1 = e^(Ea/R(1/T1 - 1/T2))

This paper I've been reading (doing similar things as I am) is however suggesting the following equation:

k2/k1 = (T2+460)/(T1+460) * 10^((-394)*H*(1/(T2+460)-1/(T1+460)))

The second equation isn't using SI units, so temperatures are in F and entalphy is in kcal.

I've been trying to convert the second equation into the first one (or vice versa) to check everything is OK and I can't get it to work. My main problem is the first part, (T2+460)/(T1+460).

My calc is a bit rusty, so I'm not sure where I'm going wrong (or if the problem is elsewhere)...

Would really appreciate some help. Thanks!