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Chemical Kinetics

Question

Write the rate of reaction for the following reactions in terms of the concentration of reactants and products
(i) 2H₂O₂→ 2H₂O + O₂(ii) 2NO + O₂ → 2NO₂

Solution

(i) For the reaction:
2H₂O₂→ 2H₂O + O₂The rate of reaction is given by the rate of reaction

= - \frac{1}{2} \frac{d [H_{2} O_{2}]}{dt} = + \frac{1}{2} \frac{d [H_{2} O]}{dt} = + \frac{d [O_{2}]}{dt}

(ii) For the reaction:

2 NO + O_{2} \to 2 {NO}_{2}

The rate of reaction is

= - \frac{1}{2} \frac{d [NO]}{dt} = - \frac{d [O_{2}]}{dt} = + \frac{1}{2} \frac{d [{NO}_{2}]}{dt}