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If you have any test reviews, homeworks, guides, anything school related that you think can be posted on this website, reach out to me at makingschooleasier@gmail.com   Practice calculating Activation Energy The following table gives the variation of the rate constant with temperature for the first-order reaction:   2N 2 O 5 (g)  2N 2 O 4 + O 2 (g). T (K) k (s -1 ) 273 9.89x10 3 298 2.20x10 5 318 6.58x10 6 338 3.98x10 7 Determine graphically the activation energy (Ea) for the reaction. Practice with Half life A solution that is 5.2x10-8 M in 32P is stored in a metal container for 100 days. 1. Plot the decay in the concentration of 32P as a function of time. The half life of               32P is 14.3 days. 2. Plot ln[32P] as a function of time. 3. Show on both plots when the [32P] is 50%, 75% and 90% of its original value. 4. Show how you could use the plot of the natural log to obtain the rate constant              and