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Rate equation and order of a reaction.
THIS TUTORIAL IS AIMED AT ENABLING A STUDENT TO DETERMINE THE ORDER OF REACTING SPECIES AND TO WRITE OUT THE RATE EQUATION FROM A SET OF DATA FROM SEVERAL EXPERIMENTS. TO DETERMINE THE RATE CONSTANT AND IT UNITS.
1. (a) Define the following terms
(i) Reaction rate.
(ii) Order of a reaction.
(iii) Rate equation.
(iv) Overall order of a reaction.
(b) The data below were obtained for the following homogenous reaction
2NO(g) + 2H2(g) 2H2O(g) + N2(g)
NO(mol)
H2(mol)
Rate of formation of nitrogen(mol)
5.00 x 10-4
1.00 x 10-4
4.5 x 10-4
5.00 x 10-4
2.00 x 10-4
9.0 x 10-4
1.00 x 10-4
5.00 x 10-4
0.9 x 10-4
2.00 x 10-4
5.00 x 10-4
3.6 x 10-4
If the rate equation for the reaction is given by the expression
Rate = k
(i) Deduce the value of x.
(ii) Deduce the value of y.
(iii) Calculate the value of k and give its units.
(c) The data below was obtained for the reaction
A + B Products
Experiments
Initial concentration (moldm-3)
Rate (moldm-3s-1)
A
B
1
0.1
0.1
1.6 x 10-3
2
0.1
0.2
3.2 x 10-3
3
0.1
0.3
4.8 x 10-3
4
0.2
0.1
6.4 x 10-3
5
0.3
0.1
w
(i) Determine the order of the reaction with respect to B.
(ii) Determine the value of w in the table.
(iii) Write the rate equation of the reaction
(iv) Calculate the value of rate constant and give its units.
- @
- 3 orders completed
- ANSWER
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