   Chapter 14, Problem 14PS

Chapter
Section
Textbook Problem

Data for the following reaction are given in the table below.CO(g) + NO2(g) → CO2(g) + NO(g) (a) What is the rate law for this reaction? (b) What is the rate constant for the reaction? (c) What is the initial rate of the reaction in experiment 4?

(a)

Interpretation Introduction

Interpretation: The rate law for this reaction has to be given.

Concept introduction:

Rate law or rate equation: The relationship between the reactant concentrations and reaction rate is expressed by an equation.

aA + bBxXRate of reaction = k [A]m[B]n

Order of a reaction: The order of a reaction with respect to a particular reactant is the exponent of its concentration term in the rate law expression, and the overall reaction order is the sum of the exponents on all concentration terms.

Rate constant, k: It is a proportionality constant that relates rate and concentration at a given temperature.

Explanation

The rate law is given as,

Reaction Rate = k [CO]m[NO2]n,where m, and n are orders of the reactants.Givenreaction:  CO(g) + NO2(g)CO2(g)+NO(g)Findorderofthereaction:_Comparingfirsttwoexperiments1and3,rate1 =[CO]m[NO2]n, rate 1 = 3.4×10-8 mol/L.hrate3 = k [CO]m[NO2]n, rate 3 = 6.8×10-8 mol/L.hrate 3rate1 = k [CO]m[NO2]nk [CO]m[NO2]n6.8×10-8 mol/L.h3.4×10-8 mol/L.h=(1.0×10-3)m(0.36×10-4)n(5.0×10-4)m(0.36×10-4)n 2 = (2)mm = 1Comparinglasttwoexperiments1 and2,rate1 =[CO]m[NO2]n,rate 1 = 3

(b)

Interpretation Introduction

Interpretation:

The rate constant for the reaction has to be given.

Concept introduction:

Rate law or rate equation: The relationship between the reactant concentrations and reaction rate is expressed by an equation.

aA + bBxXRate of reaction = k [A]m[B]n

Order of a reaction: The order of a reaction with respect to a particular reactant is the exponent of its concentration term in the rate law expression, and the overall reaction order is the sum of the exponents on all concentration terms.

Rate constant, k: It is a proportionality constant that relates rate and concentration at a given temperature.

(c)

Interpretation Introduction

Interpretation:

The initial rate of the experiment 4 has to be given.

Concept introduction:

Rate law or rate equation: The relationship between the reactant concentrations and reaction rate is expressed by an equation.

aA + bBxXRate of reaction = k [A]m[B]n

Order of a reaction: The order of a reaction with respect to a particular reactant is the exponent of its concentration term in the rate law expression, and the overall reaction order is the sum of the exponents on all concentration terms.

Rate constant, k: It is a proportionality constant that relates rate and concentration at a given temperature.

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