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Final Exam Review Chemistry
Final Exam Review Chemistry
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Final exam review for College Prep Chemistry
Flashcards
38 cards
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Questions
38
Answers
1
In calorimetry, the heat absorbed by an endothermic reaction is released from the
thermometer
reactants
atmosphere
water surrounding the sealed bomb
2
What are the coefficients that will balance the equation: N
2
+ H
2
--> NH
3
3,1,2
1,3,2
1,3,3
1,1,2
3
Which statement is true if 12 mol of CO and 12 mol of Fe
2
O
3
react? 3CO + Fe
2
O
3
--> 2Fe + 3CO
2
The limitng reactant is Fe2O3 and 36 mol of CO2 will form
the limiting reactant is CO and 8.0 mol of Fe will be formed
The limiting reactant is Fe2O3 and 24 mol of Fe will form
the limiting reactant is CO and 3.0 mol of CO2 will form
4
Predict the products of: K + AgNO
3
--> _____
AgNO3 + K2
AgKNO3
KNO3 + Ag
AgK + NO3
5
If the system were heated, the equilibrium would shift
right
left
6
How much heat is necessary to raise temp of 10 g of Al from 20°C to 30°C? (specific heat: .90 J/g*°C)
120 J
90 J
9 J
199 J
7
If pressure is constant, the relationship between Kelvin temperature and volume is
inversely proportional
directly proprtional
8
At STP, how many liters of oxygen will react with 3.6 liters of hydrogen? 2H
2
+ O
2
--> 2H
2
O
2.0 L
3.6 L
1.8 L
2.4 L
9
The thermodynamic quantity that expresses the degree of disorder in a system is:
entropy
enthalpy
internal energy
heat flow
10
In the reaction 2CO + O
2
--> 2CO
2
what is the ratio of moles of oxygen to moles to CO
2
?
1:1
1:2
2:2
2:1
11
What does the 2nd Law of Thermodynamics state?
Spontaneous processes increase the disorder of the universe
The entropy of a perfect crystal at 0 K is 0
Mass can neither be created nor destroyed
The energy of the universe is constant
12
2 Al + 3 CuSO
4
--> Al
2
(SO
4
)
3
+ 3 Cu [how many grams of Cu form from reaction of 51g of Al?]
81 g
0.045 g
180 g
2.8 g
13
The reaction 2Fe + 3Cl
2
--> 2FeCl
3
is an example of which type of reaction?
decomposition
single-replacement
combustion
synthesis
14
How many moles of aluminum are needed to react completely with 1.2 mol of FeO? (*mole ratio*)
1.6 mol
2.4 mol
1.2 mole
0.8 mole
15
Ammonia has a pH of 11. Is this an acid, base, or neutral solution?
base
neutral
acid
16
One way to increase the pressure of a gas is to
decrease temperature
increase the number of gas particles
increase volume
lower the kinetic energy of gas molecules
17
What are the coefficients that will balance the equation: AlCl
3
+ NaOH --> Al(OH)
3
+ NaCl?
1,1,1,3
3,1,3,1
1,3,1,3
1,3,3,1
18
How many grams of O
2
are produced if 11.5 g NO
2
are formed? 2Pb(NO
3
)
2
--> 2PbO + 4NO
2
+ O
2
32.0 g
2.00 g
2.88 g
1.00 g
19
If the volume of the container were increased, the equilibrium would shift
no shift
right
left
20
The equation Mg + 2HCl --> MgCl
2
+ H
2
is an example of what type of reaction?
single-replacement
combination
double-replacement
decomposition
21
When acid reacts with a base its called .....?
Oxidation
Decomposition
Reduction
Neutralization
22
What does the 1st Law of Thermodynamics state?
For every reaction, there's an equal and opposite reaction
The heat of formation of elements is 0 K
The energy of the universe is constant
Spontaneous processes increase the disorder of the universe
23
If 3.0 L of helium at 20.0° C is allowed to expand to 4.4 L, what is the new temperature?
157 K
-30°C
430 K
702 K
24
When aluminum nitrate reacts with lithium sulfate, the correct products would be:
Al2(SO4)3 and LiNO3
AlLi2 and SO4(NO3)3
Al(NO3)3 and Li2SO4
AlSO4 and Li2(NO3)3
25
Which property would not be used to determine if the system is at equilibrium?
pressure
mass
colour
temperature
26
Which of the following is a base?
NaOH
HCl
HBr
KCl
27
Which is false about Gibb's Free Energy?
When ∆G is positive the reaction is spontaneous
When ∆G is negative the reaction is spontaneous
Endothermic reactions usually have positive ∆G
Exothermic reactions usually have negative ∆G
28
What is the value for the heat of the reaction?
+20 kJ
-20 kJ
-60 kJ
+60 kJ
29
Based on the graph, the rate of the reaction is....
constant
not constant
30
In calorimetry, the heat released by an exothermic reaction is absorbed by the
reactants
thermometer
atmosphere
water surrounding the sealed bomb
31
If pressure of a gas is increased and volume is constant, what will happen to temperature?
stay the same
increase
decrease
32
A sample of a gas at STP occupies 45.00mL. What must the new pressure be to change the volume to 1.00L at 200 K?
.0329 atm
.0329 kPa
.0658 kPa
.0658 atm
33
In the following equilibrium, what causes the equilibrium to shift to the left?
removing some NO(g)
adding H2O (g)
increasing the volume
decreasing the temperature
34
Cobalt (III) chloride reacts with lithium hydroxide in double replacement: which is a product?
Co(OH)2
LiCl3
LiCo3
Co(OH)3
35
The equation H
3
PO
4
+ 3KOH --> K
3
PO
3
+ 3H
2
O is what type of reaction?
synthesis
decomposition
single-replacement
double-replacement
36
What are standard temperature and pressure conditions for gases?
0°C and 760 torr
0 K and 760 Torr
0° and 0 torr
-273°C and 1 atm
37
How do gas particles respond to an increase in volume?
increase in temperature and increase in pressure
decrease in kinetic energy and decrease in pressure
increase in kinetic energy and increase in temperature
incrase in kinetic energy and decrease in temperature
38
If temperature is constant, the relationship between pressure and volume is
directly proportional
inversely proportional
