kinetics (physical chemistry)

timer Asked: Feb 6th, 2016

Question description

Given two expressions for the rate constant for the reacion C4H9O + NO yields products.
1)  k = 7.8 x 10^-12 exp(+2.85 kJ/mol) cm^3/mol
2)  k =  4.2 x 10^-11 (T/200)^-1.27 cm^3/mol

Do these two expressions yield significantly different rate constants from each other in the temperature range from 200-400K?  What if anything is the physical significance of any part of either expression?

I don't quite know what to do.  Of course they are significantly different.  You can tell that without doing anything.  But I don't understand the expressions.  I think they have something to do with Gibbs free energy and/or enthalpy but I'm just guessing about this.  Can you help?

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