3. Calculate the activation energy of a reaction if the rate constant is 0.75 s-1 at 25°C and 11.5 s-1 at 75°C. 4. Kc = 0.040 for the system below at 450.°C. Evaluate Kp for the reaction at 450.°C. PCI5(g) PCI3(g) + Cl2(g)

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