Ex 2: Doubling the rate constant The activation energy of a first order reaction is 50.2 kJ/mol at 25°C. At what temperature will the rate constant double? Ea 1 In (k²) - B² (+/-77) (笑) = R 1 a) 3.24 x 10-3 K b) 308 K c) 4100 K d) 298 K