Concise Physical Chemistry

c10 JWBS043-Rogers September 13, 2010 11:26 Printer Name: Yet to Come

164 CHEMICAL KINETICS

(There is a fourth and more equations that you can probably write down by extrapo-

lation of A, B, and C. Try it!

Problem 10.9

Given the following experimental data in terms of timetand concentration of reactant

NOBr in mol dm^3 , find the rate law and the rate constant for the reaction:

NOBr(g)→NO(g)+^12 O 2 (g)

t 0610152025

NOBr 0.025 0.019 0.016 0.014 0.012 0.011

Problem 10.10

The decomposition of NOCl to NO and Cl 2 is analogous to the reaction just studied:

NOCl(g)→NO(g)+^12 Cl 2 (g)

The second-order rate constant is 9. 3 × 10 −^5 dm^3 mol−^1 s−^1 at 400 K and 1. 0 ×

10 −^3 dm^3 mol−^1 s−^1 at 430 K. What is the activation energy of this reaction?