Enthalpy Of Reaction And Calorimetry Worksheet Page 18
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20KINETICS - REVIEW
1. At high temperatures, the following reaction occurs:
4 NH 3 (g)
+
5 O 2 (g)
4 NO (g)
+
6 H 2 O (g)
One experiment showed a concentration of ammonia of 0.120 mol/L at 10 s and of 0.100 mol/L at 55 s.
Calculate the average rate, over this time interval, for each of the following:
a) the rate of decomposition of NH 3 .
b) the rate of production of water.
c) the rate of production of NO.
d) the rate of consumption of oxygen.
2. For the following reactions,
For the following reaction and its reverse activation energies were determined as follows:
C 2 H 4(g)
+
H 2 (g)
C 2 H 6(g)
E a = 180 kJ/mol
C 2 H 6(g)
C 2 H 4(g)
+
H 2(g)
E a = 317 kJ/mol
Calculate ∆H for the reaction of C 2 H 4 with hydrogen
3. For the reaction:
2 A
+
2 B
C
+
D
The following data about the reaction above were obtained from three experiments:
Rate of Formation of C (mol/L •min)
Experiment
[A] mol/L [B] mol/L
6.3x10 -3
1
0.60
0.15
2.8x10 -3
2
0.20
0.60
7.0x10 -4
3
0.20
0.15
a) What is the rate equation for the reaction?
b) What is the numerical value of the rate constant k? What are its dimensions?
c) Propose a reaction mechanism for this reaction.
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