# rate constant

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A reaction has a rate constant of 1.25×10−4 at 28 and 0.227 at 77. Determine activation barrier for reaction

What is the value of the rate constant at 18?

• rate constant -

Use the Arrhenius equation and solve for Ea.
Use the Arrhenius equation a second time with the Ea determined in the first part along with either k1 or k2 and calculate k3 for 18 C.

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