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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.

127 Views

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)

146 Views

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)

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

CO(g) + NO₂(g) → CO₂(g) + NO(g)

$rate = \frac{- d [CO]}{dt} = \frac{- d [{NO}_{2}]}{dt} = \frac{d [{CO}_{2}]}{dt} = \frac{d [NO]}{dt}$