The temperature dependence of the N2O5 decomposition rate constant is characterized by the following data:
t, 0C 0 25 35 45 55 65
k, s -1 7.87*10-7 3.46*10-5 1.46*10-4 4.98*10-4 1.5*10-3 4.87*10-3
Find graphically the activation energy and the rate constant at 50 °C.

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