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Chemical Kinetics

Short Answer Type

121. 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?

126 Views

Long Answer Type

122. Write the overall reaction and the rate law from the following elementary reactions:

NO + {Br}_{2} ⇋ {NOBr}_{2} (fast) {NOBr}_{2} + NO \to 2 NOBr (slow)

What is the order of the reaction?

130 Views

Short Answer Type

123. Consider the reaction

A \overset{k}{\to} P .

The change in concentration of A with time is shown in the following plot:
(i) Predict the order of reaction.
(ii) Derive the expression for the time required for the completion of the reaction.

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124. Express the rate of the following reaction in terms of disappearance of the reactants and appearance of products:
PCl₅(g) → PCl₃(g) + Cl₂(g)

232 Views

125. Express the rate of the following reaction in terms of disappearance of the reactants and appearance of products:
2NO(g) + O₂(g) → 2NO₂(g)

172 Views

126. Express the rate of the following reaction in terms of disappearance of the reactants and appearance of products:
H₂(g) + l₂(g) → 2HI(g)

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127. Express the rate of the following reaction in terms of disappearance of the reactants and appearance of products:
CO(g) + NO₂(g) → CO₂(g) + NO(g)

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128. Express the rate of the following reaction in terms of disappearance of the reactants and appearance of products:
2NO₂(g) + F₂(g) → 2NO₂ F(g)

The rate of the reaction in terms of disappearance of the reactant and appearance of product.

2NO₂(g) + F₂(g) → 2NO₂ F(g)

$rate = \frac{- 1}{2} \frac{d [{NO}_{2}]}{dt} = - d \frac{[F_{2}]}{dt} = \frac{1}{2} \frac{d [{NO}_{2} F]}{dt}$