Problems A
265
ing the table: +, -, 0, R, and L to mean increase, decrease, no effect, shift right, and
shift left, respectively.
Change
Decrease in total pressure
Increase in temperature
Decrease in partial
pressure of lastnamed gas
A catalyst added
Argon gas added, keeping
total pressure constant
A. Effect on
position
K v
B. Effect on
position
*»
C. Effect on
position
K v
2. A 0.50 mole sample of SbCl 5 is put into a closed container and heated to
248.0°C at 1 atm. At equilibrium, analysis shows 42.8% by volume of C1 2 in
the mixture. Calculate K y at this temperature for the dissociation reaction
SbCl 5 ?± SbCl 3 + C1 2 .
3. Analysis of the equilibrium mixture that results from heating 0.25 mole of CO 2
to a temperature of 1100°C at a pressure of 10 atm shows the presence of 1.40
x 10~
3
% O 2 by volume. Calculate the value of K v for the dissociation reaction
2CO 2 ?± 2CO + O 2 at this temperature.
4. Calculate the value of K f for (a) the dissociation of H 2 S at 1130°C and 1200°C,
and (b) the reaction of H 2 + C1 2 at 1200°C and 1800°C, using the K v values
given in Table 16-1. (c) Calculate the values of K v for the dissociation of HC1
at 1200°C and 1800°C.
5. Calculate the percentage of H 2 that dissociates to atoms at a total pressure of
0.1 atm H 2 and (a) 1000°C and (b) 2000°C.
6. Calculate the percentage of H 2 S that dissociates at a pressure of 100 atm and
1130°C.
7. Calculate the composition of the equilibrium gas mixture that results when (a)
0.500 mole each of CO 2 and H 2 are mixed at 1000°C and a total pressure of
2.00 atm, and (b) 1.00 mole of CO and 5.00 moles of H 2 O are mixed at 1000°C
and a total pressure of 2.00 atm.
8. What percentage of Br 2 will be converted to COBr 2 if (a) an equimolar mixture
of CO and Br 2 is heated to 70.0°C at a total pressure of 10.0 atm, and (b) a 9 : 1
mixture of CO to Br 2 is heated to 70.0°C at a total pressure of 10.0 atm? The
value of K v is 0.0250 atm1 for the reaction CO,,, -t- Br 2(9l <=* COBr 2(fl) . (c)
What is the value of K c for this reaction?
265
ing the table: +, -, 0, R, and L to mean increase, decrease, no effect, shift right, and
shift left, respectively.
Change
Decrease in total pressure
Increase in temperature
Decrease in partial
pressure of lastnamed gas
A catalyst added
Argon gas added, keeping
total pressure constant
A. Effect on
position
K v
B. Effect on
position
*»
C. Effect on
position
K v
2. A 0.50 mole sample of SbCl 5 is put into a closed container and heated to
248.0°C at 1 atm. At equilibrium, analysis shows 42.8% by volume of C1 2 in
the mixture. Calculate K y at this temperature for the dissociation reaction
SbCl 5 ?± SbCl 3 + C1 2 .
3. Analysis of the equilibrium mixture that results from heating 0.25 mole of CO 2
to a temperature of 1100°C at a pressure of 10 atm shows the presence of 1.40
x 10~
3
% O 2 by volume. Calculate the value of K v for the dissociation reaction
2CO 2 ?± 2CO + O 2 at this temperature.
4. Calculate the value of K f for (a) the dissociation of H 2 S at 1130°C and 1200°C,
and (b) the reaction of H 2 + C1 2 at 1200°C and 1800°C, using the K v values
given in Table 16-1. (c) Calculate the values of K v for the dissociation of HC1
at 1200°C and 1800°C.
5. Calculate the percentage of H 2 that dissociates to atoms at a total pressure of
0.1 atm H 2 and (a) 1000°C and (b) 2000°C.
6. Calculate the percentage of H 2 S that dissociates at a pressure of 100 atm and
1130°C.
7. Calculate the composition of the equilibrium gas mixture that results when (a)
0.500 mole each of CO 2 and H 2 are mixed at 1000°C and a total pressure of
2.00 atm, and (b) 1.00 mole of CO and 5.00 moles of H 2 O are mixed at 1000°C
and a total pressure of 2.00 atm.
8. What percentage of Br 2 will be converted to COBr 2 if (a) an equimolar mixture
of CO and Br 2 is heated to 70.0°C at a total pressure of 10.0 atm, and (b) a 9 : 1
mixture of CO to Br 2 is heated to 70.0°C at a total pressure of 10.0 atm? The
value of K v is 0.0250 atm1 for the reaction CO,,, -t- Br 2(9l <=* COBr 2(fl) . (c)
What is the value of K c for this reaction?