Ch.13-62 BCBCAB

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Equilibrium 4
Assessment ID:
dna.2119
ib.19334
Directions: Read the passage below and answer the question(s) that follow.
Ch.13-62
What will happen to the number of moles of SO3 in equilibrium with SO2 and O2 in the reaction
2SO3(g) ↔ 2SO2(g) + O2(g)
ΔH°=197kJ
in each of the following cases?
1
Oxygen gas is added.
3
The pressure is increased by adding argon gas.
A. SO3 will increase.
A. SO3 will increase.
B. SO3 will decrease.
B. SO3 will decrease.
C. SO3 will remain the same.
C. SO3 will remain the same.
Master ID: 185482 Revision: 1
Correct: A
Rationale:
A. Adding oxygen will speed up the reverse
reaction, creating more SO3.
Master ID: 185484 Revision: 1
Correct: C
Rationale:
B.
C.
Rubric: 0 Point(s)
Standards:
APS.SCI.9-12.III.C
APS.SCI.9-12.III.C.1
2
A.
B.
C.
Adding argon gas does not affect the partial
pressure of either the reactants or the
products.
Rubric: 0 Point(s)
Standards:
APS.SCI.9-12.III.C
APS.SCI.9-12.III.C.1
The pressure is increased by decreasing the
volume of the reaction container.
A. SO3 will increase.
B. SO3 will decrease.
C. SO3 will remain the same.
Master ID: 185483 Revision: 1
Correct: A
Rationale:
A. Decreasing the volume will affect the
reverse reaction more as there are 3
product gas particles and only 2 reactant
gas particles.
B.
C.
Rubric: 0 Point(s)
Standards:
APS.SCI.9-12.III.C
APS.SCI.9-12.III.C.1
Illuminate Itembank™
Generated On February 26, 2013, 8:12 AM PST
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Page 1
Equilibrium 4
Assessment ID:
dna.2119
ib.19334
Directions: Answer the following question(s) relating to the passage titled "Ch.13-62".
4
The temperature is decreased.
A. SO3 will increase.
B. SO3 will decrease.
C. SO3 will remain the same.
Master ID: 185485 Revision: 1
Correct: A
Rationale:
A. Because the reaction is endothermic,
decreasing the temperature will slow the
forward reaction more than the reverse
reaction, leading to the formation of more
SO3.
B.
C.
Rubric: 0 Point(s)
Standards:
APS.SCI.9-12.III.C
APS.SCI.9-12.III.C.1
5
Gaseous sulfur dioxide is removed.
A. SO3 will increase.
B. SO3 will decrease.
C. SO3 will remain the same.
Master ID: 185486 Revision: 1
Correct: B
Rationale:
A.
B.
Removing SO2 will decrease the rate of the
reverse reaction, resulting in the SO3
decreasing.
C.
Rubric: 0 Point(s)
Standards:
APS.SCI.9-12.III.C
APS.SCI.9-12.III.C.1
Illuminate Itembank™
Generated On February 26, 2013, 8:12 AM PST
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