Chapter 17, Problem 17B.1BE

Interpretation Introduction

Interpretation:

In a study of the enzyme catalyzed oxidation of ethanol, the molar concentration of ethanol decreased in a first order reaction from ${\text{220mmoldm}}^{\text{-3}}\text{to}\text{56}{\text{.0mmoldm}}^{\text{-3}}\text{in}\text{1}{\text{.22×10}}^{\text{4}}\text{s}$.  The rate constant of the reaction has to be determined.

Concept Introduction:

Rate of a reaction:

Rate of a reaction is the change in concentration of reactant or product per unit time.  It is expressed in terms of decrease in concentration of any of the reactants and increase in concentration of any of the products.

First order reaction:

First order reaction is a reaction in which the rate is depend only on one reactant concentration.

Example:

    ${\text{2N}}_{\text{2}}{\text{O}}_{\text{5}}\text{(l) }\stackrel{}{\to }{\text{ 4NO}}_{\text{2}}{\text{(g) + O}}_{\text{2}}\text{(g)}$