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Calculate the rate constant at 225°C for a reaction that has a rate constant of 8.1 × 10−4 s−1 at 95°C and activation energy of 87.0 kJ/mol?

May 2021 2 176 Report

Calculate the rate constant at 225°C for a reaction that has a rate constant of 8.1 × 10−4 s−1 at 95°C and activation energy of 87.0 kJ/mol?

You will use the Arrhenius equation. One form of that equation that works well for these calculations is:

ln (k2/k1) = Ea/R (1/T1-1/T2)

ln(k2/8.1X10^-4) = (8.70X10^4 J/mol / 8.314 J/molK) (1/368K - 1/498K)

ln (k2/8.1X10^-4 s^-1) = 7.423

k2/8.1X10^-4 s^-1 = 1673.9

k2 = 1.36 s^-1