t a particular temperature, the following data were collected for the reaction I

Question

t a particular temperature, the following data were collected for the reaction Initial reactant concentrations (mol-L) Initial rate of formation of I 2 ici() + Hofg) ? 1:8) + 2HCl(g) 0.0015 0.0030 0.00075 0.100 0.100 0.200 0.100 0.100 0.050 Determine the rate law and the rate constant for the reaction K rate CO 10O) (0 10 0) rate constant S. The isomernization of methyl isocyanide (CH:NC) occurs as follows: CH,NC CH,CN The reaction follows first-order kinetics and the half-lives were found to be 161 min at 199 C and 12.5 min at 230 C. Calculate the activation energy, Es. for the reaction. ? 16? 6o sec 0 83 Al

Explanation / Answer

4.

General rate law expression for the givne reaction is,

Rate = k[ICl]m[H2]n

Do (1) / (2)

0.0015 / 0.0030 = (0.100 / 0.200)m

(1/2) = (1/2)m

So, m = 1

Therefore, order of reaction with respect to ICl = 1

NOW,

Do, (1) / (3)

0.0015 / 0.00075 = (0.100 / 0.050)n

(2) = (2)n

SO, n = 1

Therefore, order with respect to H2 = 1

Overall order of reaction = 1 + 1 = 2

Rate law expression,

Rate = k[ICl][H2]

NOW,

(1) =>

0.0015 = k(0.100)(0.100)

k = 0.15 M-1s-1

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