1. Extra Problems on Kinetics

2. In the Haber process for the production of ammonia,
Problem 1
In the Haber process for the production of ammonia,
N2(g) + 3H2(g)  2NH3(g)
What is the relationship between the rate of production
of ammonia and the rate of consumption of hydrogen?

3. 2N2O5(g)  4NO2(g) + O2(g)
At a particular instant rate of (N2O5) = 4.2 x 10−7 mol·L−1·s−1
What are the rates of appearance of NO2 and O2 ?

4. If, in a certain experiment, over a specific time period,
Problem 3.
Consider the reaction
4PH3(g)  P4(g) + 6H2(g)
If, in a certain experiment, over a specific time period,
mol PH3 is consumed in a 2.0-L container each second
of reaction, what are the rates of production of P4 and H2 in this
experiment?

5. Initial Rate (mol·L-1·s-1)
A + B  C
Experiment Number
[A] (mol·L-1)
[B] (mol·L-1)
Initial Rate (mol·L-1·s-1) 1
0.100
4.0 x 10-5 2
0.200 3
1.6 x 10-4
Determine the differential rate law
Calculate the rate constant
Calculate the rate when [A]=0.050 mol·L-1 and [B]=0.100 mol·L-1

6. Use the data in table 12.5 to determine
1) The orders for all three reactants
2) The overall reaction order
3) The value of the rate constant

7. Initial Rate (mol·L-1·s-1)
2NO(g) + 2H2(g)  N2(g) + 2H2O(g)
Experiment Number
[NO] (mol·L-1)
[H2] (mol·L-1)
Initial Rate (mol·L-1·s-1) 1
0.10
1.23 x 10-3 2
0.20
2.46 x 10-3 3
4.92 x 10-3
Determine the differential rate law
Calculate the rate constant
Calculate the rate when [NO]=0.050 mol·L-1 and [H2]=0.150 mol·L-1

8. Consider the general reaction aA + bB cC and the
Sample Problem:.
Consider the general reaction aA + bB cC and the
following average rate data over some time period Δt:
Determine a set of possible coefficients to balance this
general reaction.

9. Problem Reaction: A + B  C obeys the rate law: Rate = k[A]2[B].
A. If [A] is doubled (keeping B constant), how will rate change?
B. Will rate constant k change? Explain.
C. What are the reaction orders for A & B?
D. What are the units of the rate constant?