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Balancing, Classifying, and Energy Test Review

Total questions: 66

Worksheet time: 2hrs 1mins

Name
Class
Date
1.

Classify:

2H2 + O2 ---->2H2O

a)

synthesis reaction

b)

decomposition reaction

c)

single replacement reaction

d)

double replacement reaction

2.

Classify:

2H2 + O2 ---->2H2O

a)

synthesis reaction

b)

decomposition reaction

c)

single replacement reaction

d)

double replacement reaction

3.

Classify:

2KClO3 ---->2KCl + 3Os

a)

synthesis reaction

b)

decomposition reaction

c)

single replacement reaction

d)

double replacement reaction

4.

Classify:

Mg + 2HCl ----> MgCl2 + H2

a)

synthesis reaction

b)

decomposition reaction

c)

single replacement reaction

d)

double replacement reaction

5.

Classify:

2HCl + 2NaOH -----> NaCl + H2O

a)

synthesis reaction

b)

decomposition reaction

c)

single replacement reaction

d)

double replacement reaction

6.

Classify:

CH4 + O2 → CO2 + H2O

a)

single replacement

b)

double replacement

c)

synthesis

d)

combustion

7.

Reactants combine to produce one product.

a)

single replacement

b)

double replacement

c)

synthesis

d)

combustion

8.

One reactant breaks down to produce simpler substances.

a)

synthesis reaction

b)

decomposition reaction

c)

single replacement reaction

d)

double replacement reaction

9.

The cation of one compound replaces the cation of a second compound.

a)

synthesis reaction

b)

decomposition reaction

c)

single replacement reaction

d)

double replacement reaction

10.
What coefficients are needed to correctly balance the equation?
_Bi   +   _O2   →  _Bi2O3
a)
3,2,3
b)
2,3,2
c)
4,3,2
d)
none of these
11.

Balance this equation, Al2O3 ---> Al + O2

a)

Cannot be balanced

b)

2Al2O3 ---> 2Al + 3O2

c)

2Al2O3 ---> 4Al + 3O2

d)

3Al2O3 ---> 2Al + O2

12.

Balance this equation: H2 + N2 → NH3

a)

H2 + 4N2 → NH3

b)

H2 + 3N2 → 2NH3

c)

3H2 + N2 → 2NH3

d)

2H2 + 2N2 → 2NH3

13.

Balance this reaction: __ RbNO3 + __ BeF2 ----> __ Be(NO3)2 + __ RbF

a)

1,1,1,1

b)

1,2,1,1

c)

2,1,1,2

d)

2,1,2,1

14.
Is the equation balanced?: 2H2O + O2 --> 4MgO + 3Fe
a)
Yes
b)
No
15.
Balance this equation
_Al +_HCl --> _H2 +_AlCl3
a)
2, 6, 3, 2
b)
it is already balanced
c)
4, 12, 3, 4
d)
2, 1, 4, 5
16.
What does the Law of Conservation of Mass state?
a)
Matter cannot be gained or lost in a chemical reaction.
b)
Matter can only be lost in a chemical reaction.
c)
Matter can only be gained in a chemical reaction.
d)
Matter can be gained and lost in a chemical reaction. 
17.
What is the little number after an element in a chemical equation called.
Example: H2
a)
Coefficient 
b)
Subscript
c)
Atom
d)
Equation
18.
When balancing equations a ____ can be placed to the left of a formula of a substance to make the equations balanced
a)
charge
b)
subscript
c)
random number
d)
coefficient
19.

The reactants are on the left side of the chemical equation.

a)

True

b)

False

20.
What is the right part of a chemical equation called...
2H2 + O2 --> 2H2O
a)
Reactants
b)
Products 
c)
Yields 
d)
Chemical Equation 
21.
Is the following equation balanced?
2C2H2 + 5O2 --> 4CO2 + 2H2O
a)
yes
b)
no
22.
What is essential for a combustion reaction to begin?
a)
Carbon dioxide
b)
Fuel 
c)
Fuel, oxygen and heat
d)
Water and oxygen
23.
What kind of energy conversion does a combustion reaction involve?
a)
Kinetic to Potential Energy
b)
Chemical Potential Energy to Kinetic or Thermal Energy
c)
Potential Energy to Nuclear Energy
d)
Mass to Energy
24.
What are the types of combustion?
a)
Complete & incomplete
b)
Incomplete & inexact
c)
Impossible & complete
d)
Computer & incompete
25.
Complete combustion is when there is plenty of oxygen to react with. 
a)
True
b)
False
26.
Incomplete combustion is when there is a limited amount of oxygen.
a)
True
b)
False
27.
All combustion reactions are 
a)
endothermic
b)
exothermic
c)
neutral
d)
fast
28.

What is the unit of temperature ?

a)

Celsius

b)

Gram

c)

Meter

d)

Calorie

29.
The kind of heat transfer that travels through space in electromagnetic waves is ______________________.
a)
insulation.
b)
Radiation
c)
Conduction
d)
Convection
30.
In heat transfer, heat always flows from the _______________ substance to the _______________ substance.
a)
Hotter to colder
b)
Colder to hotter
c)
Hotter to hotter
d)
Colder to colder
31.
The type of heat transfer that happens through direct contact of molecules or particles with each other is ___________________.
a)
Convection
b)
Conduction
c)
Radiation
d)
insulation.
32.
___________________ is the type of heat transfer that occurs in fluids, such as warm air rising and cold air sinking; creating wind.
a)
Convection
b)
Conduction
c)
Radiation
d)
insulation.
33.
When you use a microwave, what is the main way that heat is transferred?
a)
Convection
b)
Conduction
c)
Radiation
d)
insulation.
34.
The handle of a metal spoon warms up when it is placed in a hot bowl of soup because of
a)
Convection
b)
Conduction
c)
Radiation
d)
insulation.
35.
Which of the following is NOT a conductor?
a)
oven mitt
b)
curling iron
c)
iron skillet
d)
copper pipe
36.
A large house being heated by heater warms a house when the air is circulating.
a)
Convection
b)
Conduction
c)
Radiation
d)
insulation.
37.
Which situation best represents convection?
a)
Heat from a campfire
b)
A hot air balloon taking off
c)
Touching a hot piece of metal
d)
Getting sunburned
38.
Which statement is true about radiation?
a)
Radiation is the transfer of heat through electromagnetic waves
b)
Radiation is the transfer of heat through direct contact.
c)
Radiation is more dangerous than conduction.
d)
Radiation is the transfer of heat through liquids and gases
39.
What best describes the energy conversion that takes place in a microwave oven?
a)
electrical to light to thermal
b)
chemical to thermal to light
c)
electrical to thermal to sound
d)
nuclear to thermal to chemical
40.
Turning on a lamp is an example of energy transformation from electrical to 3 forms of energy. Which of these is NOT created by the lamp?
a)
radiant
b)
light
c)
heat
d)
chemical
41.
Which of the following energy transfers occurs when food is digested?
a)
chemical to mechanical
b)
radiant to nuclear
c)
mechanical to potential
d)
thermal to chemical
42.
What is the best example of a device that converts electrical energy to thermal energy?
a)
a toaster
b)
a clock radio
c)
a flashlight
d)
an electric toothbrush
43.
Which of the following radiant energy to electrical energy?
a)
solar calculator
b)
windmill
c)
glow stick
d)
firecracker
44.
Which of the following mechanical energy to electrical energy?
a)
solar calculator
b)
windmill
c)
glow stick
d)
firecracker
45.
Which of the following chemical energy to radiant energy?
a)
solar calculator
b)
windmill
c)
glow stick
d)
firecracker
46.
Which of the following chemical energy to sound and radiant energy?
a)
solar calculator
b)
windmill
c)
glow stick
d)
firecracker
47.
Which of the following converts chemical energy to radiant energy?
a)
candle
b)
light bulb
c)
coal power plant
d)
nuclear power plant
48.
Which of the following converts electrical energy to radiant energy?
a)
candle
b)
light bulb
c)
coal power plant
d)
nuclear power plant
49.
Which of the following converts nuclear energy to electrical energy?
a)
candle
b)
light bulb
c)
coal power plant
d)
nuclear power plant
50.
Which of the following converts chemical energy to electrical energy?
a)
Battery
b)
Person eating food
c)
Automobile
d)
Camp Fire
51.
Which of the following converts mechanical energy to a different type of mechanical energy?
a)
Battery
b)
Person riding a bike
c)
Automobile
d)
Camp Fire
52.
Energy of motion is which type of energy?
a)
Potential
b)
Kinetic
c)
Sound
d)
Gravitational
53.
Energy that is stored in bonds between atoms is:
a)
Mechanical energy
b)
Chemical energy
c)
Kinetic energy
d)
Nuclear energy
54.
Energy caused by the movement in the particles of matter. It is a form of kinetic energy.
a)
Nuclear energy
b)
Sound energy
c)
Light energy
d)
Thermal energy
55.
Energy that comes from the nucleus of an atom. A form of potential energy.
a)
chemical energy
b)
Nuclear energy
c)
Sound energy
d)
Electrical energy
56.
For the formula:
 Q= m c ∆T
The  units for specific heat are:
a)
g /J C
b)
°C/g J
c)
kJ/g
d)
J/g°C
57.

If two objects have different temperatures when they come in contact, heat will flow from the warmer object to the cooler one UNTIL ____________

a)

one reaches a temperature of zero

b)

they both have an equal temperature

c)

one runs out of energy

58.

If the specific heat of water is 4.18 J/g∙°C, how much heat is required to increase the temperature of 1.2 kg of water from 23 °C to 39 °C? (show your work)

a)

-80,256 J

b)

80.256 J

c)

80,256 J

d)

-80.256 J

59.
What is the specific heat of an unknown substance if 100.0 g of it at 200.0 °C reaches an equilibrium temperature of 27.1 °C when it comes in contact with a calorimeter of water.  The water weighs 75. g and had an initial temperature of 20.00 °C?  (Specific heat of water is 4.18 J/g°C) (show your work)
a)
0.111 J/g°C
b)
1.29 J/g°C
c)
0.129 J/g°C
d)
22225.85 J
60.
A reaction is performed in a beaker with a temperature probe recording the temperature changes of the reaction.  If the temperature began at 15.0 degrees Celsius and ended at 27.5 degrees Celsius. Is the reaction endothermic or exothermic?
a)
Exothermic
b)
Endothermic
61.
A sample of iron receives 50.J of heat energy that raises the temperature of the iron by 25.0°C. If iron has a specific heat of 0.10 J/g°C, what is the mass of the iron sample?  (show your work)
a)
25g
b)
30g
c)
20g
d)
50g
62.
Calorimeters use insulating materials to:
a)
encourage affordable materials in science experiments in schools.
b)
preserve the heat of the environment outside the Styrofoam cup.
c)
prevent heat from escaping to the environment.
d)
keep the liquid inside the Styrofoam cup from overheating.
63.

What does "ΔT" mean?

a)

A change in health

b)

A change in heat

c)

A change in height

d)

A change in temperature

64.

What information does the specific heat capacity of water tell us?

a)

How much energy was released in the combustion of our food item

b)

The amount of energy to raise the temperature of 1 gram of water 1 Celsius degree

c)

The amount of energy in our water when we started the calorimetry lab

d)

It is just a constant to help us cancel units

65.

In an endothermic reaction, energy moves...

a)

From the system into the surroundings

b)

From the surroundings into the system

c)

Back and forth equally between the system and the surroundings

66.

In an exothermic reaction, energy moves...

a)

From the system into the surroundings

b)

From the surroundings into the system

c)

Back and forth equally between the system and the surroundings

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