Multiple Choice Chemistry Quiz Template With Answers -Prof. Dan Schwartz Page 4
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614. (5 points) The gas phase equilibrium constant K
, equals 3.40 at 25 ˚C for the isomerization reaction:
p
cis-2-butene
trans-2-butene
If a flask initially contains 1.00 atm of each gas, what direction will the reaction shift to reach
equilibrium?
(a) It will shift left.
(b) It will shift right.
(c) The reaction is already at equilibrium
(d) The reaction is at equilibrium initially and then will shift right.
15. (5 points) An equilibrium mixture of CO, O
, and CO
at a certain temperature contains 0.0010 M CO
2
2
2
2
and 0.0015 M O
. At this temperature, K
equals 1.4 x 10
for the reaction:
2
c
2 CO (g) + O
(g)
2 CO
(g)
2
2
What is the equilibrium concentration of CO?
–6
–4
–3
–2
(a) 4.8x10
M
(b) 4.6x10
M
(c) 2.2x10
M
(d) 6.9x10
M
16. (5 points) At a certain temperature the equilibrium constant, K
, equals 0.11 for the reaction:
c
2 ICl (g)
I
(g) + Cl
(g) .
2
2
What is the equilibrium concentration of ICl if 0.750 mol of I
and 0.750 mol of Cl
are initially
2
2
mixed in a 2.00 L flask?
(a) 0.150 M
(b) 0.225 M
(c) 0.451 M
(d) 1.50 M
17. (5 points) Ammonium carbamate can dissociate into gases at 25 ˚C according to the reaction:
NH
COONH
(s)
2 NH
(g) + CO
(g) .
2
4
3
2
If sufficient ammonium carbamate solid is sealed in a flask, the total pressure will be 0.117 atm at
equilibrium. What is the value of K
at 25 ˚C?
p
–4
–4
–3
–1
(a) 2.37 x 10
(b) 2.00 x 10
(c) 1.60 x 10
(d) 3.42 x 10
18. (5 points) Which change in the system will drive equilibrium to the left in the reaction below?
N
O
(g)
NO
(g) + NO
(g)
2
5
2
3
(a) Decrease the amount of NO
.
3
(b) Increase the amount of N
O
.
2
5
(c) Increase the pressure.
(d) Increase the volume.
Exam #3
Page 4
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