The rate constants for the decomposition of a hydrocarbon were measured at different temperatures as shown. Determine the Ea (in kJ/mol) for the reaction. Use R = 8.314 J/mol·K, and report your answer up to one decimal place. Temperature, K Rate Constant, M-1/2·s 600 0.009 630 0.027 660 0.098 690 0.301 720 0.672

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