WorksheetsAP Review Quiz
Total questions: 15
Worksheet time: 33mins
Name
Class
Date
1.
Which of the following processes involves the greatest increase in entropy?
a)
SO3(g) + H2(g) → SO2(g) + H2O(g)
b)
N2(g) + 3H2(g) → 2NH3(g)
c)
Ag+(aq) Cl-(aq) → AgCl(s)
d)
MgSO3(s) → MgO(s) + SO2(g)
2.
CH3OH(g) → CO(g) + 2 H2(g)
The reaction represented above goes essentially to completion. What can be inferred about ΔS for the reaction?
The reaction represented above goes essentially to completion. What can be inferred about ΔS for the reaction?
a)
It must positive, since the reaciton is thermodynamically unfavorable.
b)
It must be negative, since there are more moles of products than reactants.
c)
It must be positive, since ΔG is negative and ΔH is positive.
d)
It must be negative, since ΔG is positive and ΔH is positive.
3.
2 Na2O2(s) + S(s) + 2 H2O(l) → 4 NaOH(aq) + SO2(aq)
Atoms of which element are reduced in the reaction?
Atoms of which element are reduced in the reaction?
a)
S; each atom loses four electrons
b)
Na in Na2O2; each atom loses one electron
c)
O in Na2O2; each atom gains one electron
d)
O in H2O; each atom gains one electron
4.
2 H2O(l) → 2 H2(g) + O2(g) ΔH = 572 kJ/mol
According to the information above, what is the standard enthalpy of formation, ΔHf, for H2O(l)?
According to the information above, what is the standard enthalpy of formation, ΔHf, for H2O(l)?
a)
-572 kJ/mol
b)
-286 kJ/mol
c)
286 kJ/mol
d)
572 kJ/mol
5.
Cu2+(aq) + 2 e- → Cu(s) E = 0.34 V
Cr3+(aq) + e- → Cr2+(aq) E = -0.41 V
According to the half-reactions represented above, which of the following occurs in aqueous solutions under standard conditions?
Cr3+(aq) + e- → Cr2+(aq) E = -0.41 V
According to the half-reactions represented above, which of the following occurs in aqueous solutions under standard conditions?
a)
Cu2+(aq) + Cr3+(aq) → Cu(s) + Cr2+(aq)
b)
Cu2+(aq) + 2 Cr2+(aq) → Cu(s) + 2 Cr3+(aq)
c)
Cu(s) + 2 Cr3+(aq) → Cu2+(aq) + 2 Cr2+(aq)
d)
Cu(s) + Cr3+(aq) → Cu2+(aq) + Cr2+(aq)
6.
I2(g) + 3 Cl2(g) → 2 ICl3(g)
According to the data in the table, what is the value of ∆H˚ for the reaction represented above?
According to the data in the table, what is the value of ∆H˚ for the reaction represented above?
a)
–382 kJ
b)
–860 kJ
c)
+180 kJ
d)
+450 kJ
7.
In the voltaic cell shown, when the switch is closed the electrons flow from the left to the right compartment. Which is oxidized?
a)
Sn
b)
Metal X
c)
Nitrogen
d)
Oxygen
8.
What is the oxidation number of chromium in Cr2O72- ion?
a)
+3
b)
+12
c)
+7
d)
+6
9.
Cu2+(aq) + 2e- → Cu(s) E°red = -0.34 V
Cr3+ + 3e- → Cr(s) E°red = -0.74 V
When the reactions above are allowed to react spontaneously, what is the resulting voltage of the cell?
Cr3+ + 3e- → Cr(s) E°red = -0.74 V
When the reactions above are allowed to react spontaneously, what is the resulting voltage of the cell?
a)
- 1.08 V
b)
-0.40 V
c)
+0.40 V
d)
+1.08 V
10.
A 1 mol sample of zinc can reduce the greatest number of moles of which of the following ions?
a)
Al3+
b)
Pb2+
c)
Ag+
d)
Cl-
11.
Which of the values of ΔH⁰ for a process in the table is (are) less than zero (i.e., indicate(s) an exothermic process)?
a)
z only
b)
y and z only
c)
x, y, and z only
d)
w, x, y, and z
12.
When solid NH4SCN is mixed with solid Ba(OH)2 in a closed container, the temperature drops and a gas is produced. Which of the following indicates the correct signs for ∆G, ∆H, and ∆S for the process?
a)
∆G < 0, ∆H < 0, ∆S < 0
b)
∆G < 0, ∆H > 0, ∆S < 0
c)
∆G < 0, ∆H > 0, ∆S > 0
d)
∆G > 0, ∆H > 0, ∆S < 0
13.
N2(g) + 3 H2(g) → 2 NH3(g)
The reaction indicated above is thermodynamically spontaneous at 298 K, but becomes nonspontaneous at higher temperatures. Which of the following is true at 298 K?
The reaction indicated above is thermodynamically spontaneous at 298 K, but becomes nonspontaneous at higher temperatures. Which of the following is true at 298 K?
a)
∆G, ∆H, and ∆S are all positive.
b)
∆G, ∆H. and ∆S are all negative.
c)
∆G and ∆H are negative, but ∆S is positive.
d)
∆G and ∆S are negative, but ∆H is positive.
14.
The reaction order for the reactant shown on the graph is (hint: a first order reaction follows half life decay kinetics where half of the amount is reacted every equal time interval):
a)
0th order
b)
1st order
c)
2nd order
15.
I will study the four additional problems Mr. Z gave us the night before the AP Chemistry Exam:
a)
Yes
b)
No
c)
Nay
d)
Нет
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