2. One monoxide in the process of industrial production of nitric acid of the re

Question

2. One monoxide in the process of industrial production of nitric acid of the reactions that lead to the formation of acid rain is that between oxygen and nitrogen 02(g) + 2N0(g) 2NO2(x) And the reaction proceeds at a rate From the following experimental data a Estimate the reaction order with respect to each of the reactants and overall b. Calculate reaction rate constant, k, and specify its units. Initial Rate (mol/L-S) Initial Reactant Concentrations (mol/L) Experiment O,1 1.10×10-2 2.20× 10-2 1.10x10-2 3.30x10-2 INO] 3.21x10-3 640×10-3 12.8×10-3 9.60× 10-3 28.8×10-, 1.30× 10-2 1.30x10-2 2.60x 10-2 1.30× 10-2 3.90× 10-2 1.10x 10-2 -0 o

Explanation / Answer

Ans 2

Rate law

r = k [O2]m [NO]n

Part a

From exp 1 and 3

r1/r3 =[O2]1m [NO]1n / [O2]3m [NO]3n

3.21/12.8 = (1.3/2.6)n

0.25 = 0.5n

0.52 = 0.5n

n = 2

From exp 1 and 2

r1/r2 =[O2]1m [NO]1n / [O2]2m [NO]2n

3.21/6.40 = (1.1/2.2)m

0.5 = 0.5m

m = 1

Rate law for this reaction

r = k [O2] [NO]2

Order with respect to O2 = 1

Order with respect to NO = 2

Overall order = 3

Part b

From exp 1

k = r1 / [O2]1 [NO]12

= (3.21*10^-3)/(1.1*10^-2*1.3*10^-2*1.3*10^-2)

= 1726.73 M-2 s-1

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