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Chemical Kinetics

Question

For the reaction at 500 K
${NO}_{2} (g) + CO (g) \to {CO}_{2} (g) + NO (g)$
The proposed mechanism is as follow:
(i)
${NO}_{2} + {NO}_{2} \to NO + {NO}_{3} (slow) {NO}_{3} + CO \to {CO}_{2} + {NO}_{2} (fast)$
Predict the law?

Solution

Step I:
${NO}_{2} (g) + {NO}_{2} (g) \to_{slow}^{k} {NO}_{3} (g) + NO (g)$

Step II:
${NO}_{3} (g) + CO \to {NO}_{2} (g) + {CO}_{2} (g)$

$________________________________Overall reaction : {NO}_{2} (g) + CO (g) \to NO (g) + {CO}_{2} (g)__________________________________$

Step II is much faster than step I, that is k₂>> k₁ Step I is rate determining step and thus the rate of overall reaction equals to rate of step I. Step I is is a bimolecular process that has the rate law :

rate = k_{1} {[{NO}_{2}]}^{2} .

Some More Questions From Chemical Kinetics Chapter

The conversion of molecules X to Y follows second order kinetics. If concentration of X is increased to three times how will it affect the rate of formation of Y?

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Chemical Kinetics

For the reaction at 500 K
${NO}_{2} (g) + CO (g) \to {CO}_{2} (g) + NO (g)$
The proposed mechanism is as follow:
(i)
${NO}_{2} + {NO}_{2} \to NO + {NO}_{3} (slow) {NO}_{3} + CO \to {CO}_{2} + {NO}_{2} (fast)$
Predict the law?

Some More Questions From Chemical Kinetics Chapter

The conversion of molecules X to Y follows second order kinetics. If concentration of X is increased to three times how will it affect the rate of formation of Y?

What will be the effect of temperature on rate constant?

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

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For Daily Free Study Material Join wiredfaculty

Chemical Kinetics

For the reaction at 500 K NO2(g) + CO(g) → CO2(g) + NO(g) The proposed mechanism is as follow:(i) NO2+NO2 → NO+NO3 (slow)NO3+CO → CO2+NO2 (fast) Predict the law?

Some More Questions From Chemical Kinetics Chapter

The conversion of molecules X to Y follows second order kinetics. If concentration of X is increased to three times how will it affect the rate of formation of Y?

What will be the effect of temperature on rate constant?

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

For the reaction at 500 K
${NO}_{2} (g) + CO (g) \to {CO}_{2} (g) + NO (g)$
The proposed mechanism is as follow:
(i)
${NO}_{2} + {NO}_{2} \to NO + {NO}_{3} (slow) {NO}_{3} + CO \to {CO}_{2} + {NO}_{2} (fast)$
Predict the law?