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Chemistry B Final Review

Total questions: 102

Worksheet time: 4hrs 16mins

Name
Class
Date
1.

Cold pack is an example of:

a)

endothermic reaction

b)

exothermic reaction

2.

The reaction of calcium chloride and water in the hot pack:

a)

releases water

b)

releases heat

c)

absorbs water

d)

absorbs heat

3.

Cold pack is an example of:

a)

endothermic reaction

b)

exothermic reaction

4.

The reaction of calcium chloride and water in the hot pack:

a)

releases water

b)

releases heat

c)

absorbs water

d)

absorbs heat

5.

The energy level diagram represents:

a)

exothermic reaction

b)

endothermic reaction

6.

In an exothermic process the surrounding loses heat. 

a)
True
b)
False
7.
In an endothermic reaction the system is releasing energy.
a)
True
b)
False
8.
As someone is running on the track they begin to perspire.  If the runner is our system, are they endothermic or exothermic?
a)
Endothermic process
b)
Exothermic process
9.

If the enthalpy (ΔH) is negative the reaction is ____.

a)
Endothermic
b)
Exothermic
c)
Neutral
10.
H2 + ½ O2 --> H2O + 285kJ is an example of a(n)
a)
Electrical equation
b)
Heat equation
c)
Thermochemical equation
11.
If ΔH is positive, heat would be shown on the _____ side of the thermochemical equation.
a)
Reactant
b)
Product
12.

How much heat does an aluminum block absorb if 10.00 grams is heated from 25.0oC to 50.0oC? The specific heat of aluminum is .900J/goC

a)
450
b)
-450
c)
225
d)
-225
13.
The diagram represents which type of reaction
a)
endothermic
b)
exothermic
14.
A measure of the average kinetic energy of a substance.
a)
heat
b)
temperature
c)
enthalpy
d)
entropy
15.
Energy can not be created or destroyed, it can only be transferred refers to the....
a)
law of conservation of energy
b)
law of conservation of mass
c)
life facts
d)
law of conservation of chemistry
16.
Thermal energy always moves:
a)
From a high temperature object to a lower temperature object.
b)
From a lower temperature object to a higher temperature object.
c)
From an object with lower kinetic energy to an object with higher kinetic energy.
d)
From an object of higher mass to an object of lower mass.
17.
ΔH value in an endothermic reaction is a positive number.
a)
True
b)
False
18.
Endothermic reactions feel
a)
warm
b)
cold
19.
Heat is measured in 
a)
joules
b)
grams
c)
degrees celcius
20.
A(n) _____________ is a device for measuring temperature.
a)
thermometer
b)
barometer
c)
anemometer
d)
psychrometer 
21.
A slower particle has a lower energy than an identical, faster particle.
a)
True
b)
False
22.
H2 + 2 C + N2 + 270.3 kJ --> 2 HCN
Is this reaction endothermic or exothermic?
a)
Endothermic 
b)
Exothermic
23.

The amount of heat energy required to change the temperature of 12 g of gold from 45°C to 15°C is -47 J. What is the specific heat capacity of gold?

a)

0.13 J/(g°C)

b)

17,000 J/(g°C)

c)

1600 J/(g°C)

d)

0.065 J/(g°C)

24.

A cast iron skillet is used to fry bacon. For optimal frying, the pan must be heated to about 178 oC from a room temperature of 22.0 oC. It is known that 1.58 x 105 J of heat energy are absorbed by the pan to reach the desired temperature and the specific heat of iron is 0.450 J/g oC. What must the mass of the skillet be?

a)

12700 g

b)

2250 g

c)

11000 g

d)

1970 g

25.

50 kj equivalent to

a)

50000 j

b)

0.005 j

c)

500 j

d)

5 j

26.

A thermochemical equation is shown. Is this an endothermic or exothermic reaction?

a)

Endothermic

b)

Exothermic

27.

Which substance has the highest specific heat capacity?

a)

Liquid water

b)

Solid water

c)

Water vapor

d)

Lead

28.
The SI unit of heat and energy is the __________.
a)
calorie
b)
heat
c)
joule
d)
watt
29.

What is the symbol for enthalpy?

a)

Δe

b)

h

c)

ΔH

d)

ΔE

30.
Which is an example of an endothermic physical reaction? 
a)
a) Ice melting 
b)
b) Combustion 
c)
c) Steam condensing 
d)
d) Photosynthesis
31.
 For which of these processes is the value of ΔH expected to be positive?
1.  The temperature increases when calcium chloride dissolves in water.
 2.  Steam condenses to liquid water
3.  Water boils
4.  Dry ice sublimates
a)
4 only
b)
1 only
c)
3 and 4 only
d)
2 and 3 only
32.
Systerm
a)
part of the Universe that is being studied
b)
everything else except the System
c)
the Sytem AND the Surroundings
d)
a russian martial art
33.

Surroundings

a)

everything else except the System

b)

part of the Universe that is being studied

c)

the Sytem AND the Surroundings

d)

the overall structure within which a user, computer, or program operates

34.
Universe
a)
the Sytem AND the Surroundings
b)
everything else except the System
c)
heat content of a system, at a constant pressure
d)
Babymetal song
35.
Enthalpy of Reaction
a)
change in Enthalpy during a reaction
b)
part of the Universe that is being studied
c)
reaction at constant pressure
d)
speed of a reaction
36.

Thermochemical Equation

a)

A + B --> AB + 25 kJ

b)

AB ⇄ A + B

c)

A + B --> AB

d)

AX + B --> A + BX

37.

4 PCl5 + 3438 kJ --> P4 + 10 Cl2 How much energy is required to produce ONE mole of chlorine?

a)
687.6 kJ
b)
859.5 kJ
c)
343.8 kJ
d)
245.8 kJ
38.
Refer to the following question:
2N2 + 3H2 --> 2NH3 + 46 kJ
How much energy would be produced if only 1 mol of nitrogen was reacted?
a)
92 kJ
b)
0.143 kJ
c)
23 kJ
d)
15 kJ
39.
Calculate ΔH when 4.72 g of carbon reacts with excess oxygen, according to the following equation?
C + O2 → CO2 
ΔH = -393.5 kJ
a)
-154.8 kJ
b)
-95.0 kJ
c)
-66.7 kJ
d)
-199.5 kJ
40.
How much energy must be used to produce 4.75 mol of gaseous water?
H2O (l) +  44.0 kJ --> H2O (g)
a)
209 kJ
b)
9.36 kJ
c)

2090 kJ

d)
9.362 kJ
41.
When the temperature of matter increases the particles...
a)
speed up and move closer
b)
speed up and move farther apart
c)
slow down and move closer together
d)
slow down and move farther apart
42.
How do gas molecules move? 
a)
in an orderly fashion 
b)
constantly and randomly
c)
in straight line paths
d)
in a circular motion
43.
When Pressure increases then the Volume must...
a)
Increase
b)
decrease
44.
When Volume increases then Pressure must...
a)
Increase
b)
Decrease
45.
What type of relationship to pressure and volume have?
a)
direct
b)
inverse
c)
no relationship
d)
I don't know
46.
What causes pressure?
a)
The walls of the container
b)
The vacuum in the container
c)
The collisions of the particles
d)
Atmospheric pressure acting on the outside walls
47.

If you lower the pressure of a metal container, what will happen to its temperature?

a)

Increase

b)

Decrease

c)

Stay the Same

48.

If you increase the temperature of a balloon, what will happen to its volume?

a)

Increase

b)

Decrease

c)

Stay the Same

49.

If you decrease the volume of a container, what will happen to it’s pressure?

a)

Increase

b)

Decrease

c)

Stay the Same

50.

What temperature scale must be used with the gas laws?

a)

Fahrenheit

b)

Celsius

c)

Kelvin

d)

Either Celsius or Kelvin

51.

If a gas is at 40℃, what is the temperature in Kelvin?

a)

40K

b)

313K

c)

233K

d)

400K

52.

In a solution, the _______ is dissolved INTO the ________ .

a)

Solute; Solvent

b)

Solvent; Solute

c)

Water; Salt

d)

Solution; Solute

53.

Water is special in part because of how it forms:

a)

Oxygen bonds

b)

Ionic bonds

c)

Hydrogen bonds

d)

Metallic bonds

54.

To dissolve more solute into a solution (and QUICKER), you could do all of the following EXCEPT

a)

Increase the temperature

b)

Use smaller particles or break apart

c)

Stir

d)

Decrease the temperature

55.

How many grams of K2Cr2O7, are soluble in 100 g of water at 95 ºC?

a)

83 grams

b)

75 grams

c)

40 grams

d)

12 grams

56.

Which substance is MOST soluble at 0 ºC?

a)

KI

b)

NaNO3

c)

NaCl

d)

Ce2(SO4)3

57.
When 20 grams of potassium chlorate, KClO3, is dissolved in 100 grams of water at 80 ºC, the solution can be correctly described as:
a)
supersaturated
b)
saturated
c)
unsaturated
58.
2H2  +   O2  →  2H2O
How many moles of oxygen are consumed if 8 moles H2 are used?
a)
2
b)
4
c)
6
d)
8
59.
For the Balanced Reaction: 3 Mg + 1 Fe2O3 → 3 MgO + 2 Fe; What is the Ratio of moles of MgO to moles Fe?
a)
3mol Mg / 2 mol Fe
b)
2 mol Mg/ 3 mol Fe
c)
1 mol Fe/ 2 mol Fe
d)
3 mol MgO / 2 mol Fe
60.
2 KClO3 → 2 KCl + 3 O2
How many moles of oxygen are produced when 6.7 moles of KClO3 decompose completely?
a)
6.7 mol
b)
1.0 mol
c)
10.1 mol
d)
4.5 mol
61.
2Na + 2H2O → 2NaOH+ H2
How many grams of hydrogen are produced if 120 g of Na are available?
a)
5.2 g
b)
2.6 g
c)
690 g
d)
45 g
62.
 SiO2 + 3C → SiC + 2CO
I need to add 8 moles of Carbon to the reaction. How many grams of Carbon should I weigh?
a)

96 g

b)
0.67 g
c)
2.67 g
d)
48 g
63.
Cl2 + 2 KBr → Br2 + 2 KCl
How many grams of potassium chloride can be produced from 356 g of chlorine and 356 g of potassium bromide?
a)
749 g
b)
223 g
c)
479 g
d)
814 g
64.
CH4 + 2 O2 → CO2 + 2 H2O
How many moles of carbon dioxide are produced from the combustion of 110 g of CH4?
a)
13.7 mol
b)
2.75 mol
c)
6.11 mol
d)
6.85 mol
65.
2 NaClO3 (s) --> 2NaCl (s) +3 O2 (g)  
12.00 moles of NaClO3 will produce how many grams of O2?
a)
256 g of O2
b)
576 g of O2
c)
288 g O2
66.
B2H6 + 3O2 -->2 HBO2 + 2 H2O
 What mass of O2 will be needed to burn 36.1 g of B2H6?
a)
13.8 g O2
b)
3.86 mol of O2
c)
124 g O2
67.
4 Al + 3 O2 –> 2 Al2O3  How much aluminum would be needed to completely react with 45 grams of O2?
a)
1.05 moles
b)
3.75 moles
c)
1.875 grams
d)
1.875 moles
68.

A sour taste is a characteristic of:

a)

acids

b)

bases

c)

neutral

d)

pH scale

69.

Which is a characteristic of a base?

a)

tastes sour

b)

found mostly in foods

c)

feels slippery

d)

turn litmus paper red

70.

pH is the measure of the concentration of ______.

a)

Acids

b)

H+ ion

c)

OH- ion

d)

Bases

71.

According to Arrhenius, what is the definition of an ACID?

a)

a substance that contains hydroxide and ionizes to produce OH-

b)

a substance that contains hydrogen and ionizes to produce H+

c)

a substance that contains hydrogen and ionizes to produce OH-

d)

a substance that contains hydroxide and ionizes to produce H+

72.

According to Bronsted-Lowry, what is the definition of an BASE?

a)

a substance that donates a hydrogen (H+) ion

b)

a substance that donates a hydroxide (OH-) ion

c)

a substance that accepts a hydrogen (H+) ion

d)

a substance that accepts a hydroxide (OH-) ion

73.

What is being donated/accepted between conjugate acid-base pairs?

a)

a hydrogen (H+) ion

b)

a hydroxide (OH-) ion

c)

water

d)

a neutron

74.

What is the conjugate base in the following reaction?

a)

HCO3-

b)

HCl

c)

H2CO3

d)

Cl-

75.
What is the conjugate acid in the following equation?
a)
PO43- 
b)
HNO3 
c)
NO3- 
d)
HPO42-
76.

Which of the following correctly identifies an Acid-Base Pair?

a)

HH4+ , OH-

b)

H2O , OH-

c)

CaCO3 ,CaCl2

d)

HNO3 , H2SO4

77.

Which of the following is an Arrhenius Acid?

a)

LiOH

b)

CO32-

c)

OH-

d)

H3PO4

78.
Which of the following shows the correct conjugate acid base pair?
a)
HCI (acid) / H3O+ (conjugate base)
b)
HCI (acid) / CI- (conjugate base)
c)
HCI (base) / CI- (conjugate acid)
d)
HCI (base) / H3O+ (conjugate acid)
79.

NaOH is:

a)

an Arrhenius base

b)

an Arrhenius acid

c)

neither an acid nor a base

d)

both an acid and a base

80.
If a solution is basic which ion will be more present?
a)
H+
b)
K+
c)
OH-
d)
H-
81.

Which of the following is a strong acid?

a)

oxalic acid

b)

nitric acid

c)

carbonic acid

d)

acetic acid

82.

CsOH is classified as a:

a)

strong acid

b)

weak acid

c)

strong base

d)

weak base

83.

Which of the following statements is true concerning acids and bases?

a)

acids and bases don't react with each other

b)

acids mixed with bases neutralize each other

c)

acids mixed with bases make stronger bases

d)

acids mixed with bases make stronger acids

84.

Neutral solutions have a pH of:

a)

0

b)

1

c)

7

d)

14

85.

True or false: a neutral solution has equal amounts of H+ and OH-.

a)

True

b)

False

86.

Which is true?

a)

pH of less than 7 is basic; pH of more than 7 is acidic

b)

pH of less than 7 is acidic; pH of more than 7 is basic

87.

NaOH may be found in drain cleaners and as a component of soaps. Is NaOH an acid or a base?

a)

Acid

b)

Base

c)

Neither (Neutral)

88.

HCl is found in household products, including some toilet bowl cleaners. Is HCl an acid or a base?

a)

Acid

b)

Base

c)

Neither (Neutral)

89.
According to the pH range which substance is more acidic than lemon juice
a)
Hydrochloric acid
b)
cabbage
c)
milk
90.
Neutralization reactions
a)
formed from joining positive and negative ions 
b)
increases OH ions
c)
froms a salt and water
d)
increases H2O ions
91.

Which of the following is most acidic:

a)

pH of 4

b)

[H+] = 1.0 x 10 -2

c)

[H+] = 1.0 x 10 -13

d)

[OH-] = 1.0 x 10 - 6

92.

Which of the following represents an acid solution:

a)

[H+] = [OH-]

b)

[H+] greater than [OH-]

c)

[H+] less than [OH-]

d)

[OH-] greater than [H+]

93.

If a solution has a [H+] of 1.0 x 10 -5, what is the [OH-]?

a)

1.0 x 10 -9

b)

1.0 x 10 -5

c)

1.0 x 10 -14

d)

1.0 x 10 -7

94.

The pH of a solution is 2.0. What is the [OH-] concentration?

a)

1x10-12M

b)

12 M

c)

1x10-2M

d)

2 M

95.

What is the pH of a solution where the [H+] is 1.0 x 10-11?

a)

11

b)

13

c)

14

d)

1

96.

What is the [H+] if the pH is 4.0?

a)

1.0 x 10-10 M

b)

1.0 x 10-4 M

c)

1.0 x 10-14 M

d)

1.0 x 10-7 M

97.
How many particles are in 13.5 grams of Beryllium?
a)
1.5 particles
b)
9 particles
c)
4x1023 particles
d)
9x1023 particles
98.
2 NaClO3 (s) --> 2NaCl (s) +3 O2 (g)  
12.00 moles of NaClO3 will produce how many grams of O2?
a)
256 g of O2
b)
576 g of O2
c)
288 g O2
99.
B2H6 + 3O2 -->2 HBO2 + 2 H2O
 What mass of O2 will be needed to burn 36.1 g of B2H6?
a)
13.8 g O2
b)
3.86 mol of O2
c)
124 g O2
100.
2CO  +  O2  −-> 2CO2
How many liters of carbon dioxide are produced from 10L of carbon monoxide?
a)
10
b)
20
c)
1
d)
5
101.
4 Al + 3 O2 –> 2 Al2O3  How much aluminum would be needed to completely react with 45 grams of O2?
a)
1.05 moles
b)
3.75 moles
c)
1.875 grams
d)
1.875 moles
102.
What is the percent yield of the following reaction if 145g of P2O5 reacts with 40 grams of water, but you only collected 112 grams of phosphoric acid? 3 H2O + P2O5 -> 2H3PO4
a)
80%
b)
85%
c)
77%
d)
58%

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