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Unit 6 Day 1 (6.1, 6.2, &6.3)

Total questions: 120

Worksheet time: 3hrs 47mins

Name
Class
Date
1.

Burning of coal

(a)  

2.

Combustion of gasoline.

(a)  

3.

Heating causes sodium bicarbonate to decompose.

(a)  

4.
In an exothermic reaction, heat is ...
a)
taken in
b)
given out
5.

In an endothermic reaction, heat is ...

a)

taken in

b)

given out

6.
If a chemical reaction is EXOTHERMIC, the temperature would....
a)
Stay the same
b)
Increase
c)
Decrease
7.
In an endothermic reaction the system is releasing energy.
a)
True
b)
False
8.
During an endothermic reaction in a beaker if we are part of the surroundings and touched the beaker, it would feel _______. 
a)
Warm
b)
Cold
9.

A student mixed two chemicals to allow them to react. The temperature before the reaction was 25 ° C. The temperature after the reaction was 18° C. Which of the following is true?

a)

It is an exothermic reaction

b)

It is an endothermic reaction

10.
Baking bread and cooking an egg are examples of....?
a)
Endothermic processes
b)
Exothermic processess
c)
None of these 
11.
What type of reaction is shown in the photo?
a)
Exothermic
b)
Isothermic
c)
Endothermic
d)
None of the  above
12.
Is photosenthysis an Exothermic or an Endothermic reaction?
a)
Endothermic
b)
Exothermic
13.

What type of reaction occurs in a hand warmer?

a)

exothermic

b)

endothermic

14.
Have you ever eaten sherbet sweets candy? They fizz in your mouth and your tongue feels cold. Why do you think that is?
a)
It is an exothermic reaction
b)
It is an endothermic reaction
c)
It is made of ice
d)
It is dissolving your mouth
15.

Temperature is...

a)

A measure of average kinetic energy in a substance

b)

The same as heat

c)

A measure of the movement of the atoms in a substance

d)

A measure of the average potential energy in a substance

16.

What type of reaction is this?

a)

Exothermic

b)

Endothermic

c)

Kinetic

d)

Potential

17.

O2(g) + 2 H2 (g) → 2 H2O (g) + EnergyO_2\left(g\right)\ +\ 2\ H_2\ \left(g\right)\ \rightarrow\ 2\ H_2O\ \left(g\right)\ +\ Energy  

a)

endothermic

b)

exothermic

18.

6 CO2+ 6 H2O + Energy → C6H12O6 + 6 O26\ CO_2+\ 6\ H_2O\ +\ Energy\ \rightarrow\ C_6H_{12}O_6\ +\ 6\ O_2

a)

endothermic reaction

b)

exothermic reaction

19.
If the enthalpy ter (ΔH) is negative the reaction is ____.
a)
Endothermic
b)
Exothermic
c)
Neutral
20.
If the enthalpy ter (ΔH) is negative the reaction is ____.
a)
Endothermic
b)
Exothermic
c)
Neutral
21.
H2 + ½ O2 --> H2O + 285kJ is an example of a(n)
a)
Electrical equation
b)
Heat equation
c)
Thermochemical equation
22.
If ΔH is positive, heat would be shown on the _____ side of the thermochemical equation.
a)
Reactant
b)
Product
23.
Energy transfered between samples of matter because of a difference in their temperature.
a)
Temperature
b)
Enthalpy
c)
Entropy
d)
Heat
24.
How much heat does an aluminum block absorb if 10.00 grams ae heated from 25.0oC to 50.0oC? the specific heat of aluminum is .900J/goC
a)
450
b)
-450
c)
225
d)
-225
25.
The diagram represents which type of reaction
a)
endothermic
b)
exothermic
26.
When you dropped a hot metal sample into room temperature water in the lab what happened?
a)
the heat from the metal traveled into the water
b)
the cool from the water traveled into the hot metal
c)
both of the other answers are correct
27.
A measure of the average kinetic energy of a substance.
a)
heat
b)
temperature
c)
enthalpy
d)
entropy
28.

The potential energy diagram of a reaction is shown. Which statement below is correct relating to this reaction?

a)

#1 represents the enthalpy change for this exothermic reaction.

b)

#2 represents the enthalpy change for this endothermic reaction.

c)

#3 represents the enthalpy change for this endothermic reaction.

d)

#4 represents the enthalpy change for this exothermic reaction.

29.
In an exothermic process the surrounding looses heat. 
a)
True
b)
False
30.
In an endothermic reaction the system is releasing energy.
a)
True
b)
False
31.
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
32.
The specific heat(c) of copper is 0.39 J/g °C. What is the temperature change(∆t) when 100 Joules of heat(Q) is added to 20 grams?
a)
12.82 °C
b)
24.12°C
c)
351 °C
33.
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.
34.
ΔH value in an endothermic reaction is a positive number.
a)
True
b)
False
35.
Define 'Enthalpy'
a)
a) Energy stored in the movement of molecules in a substance
b)
b) The opposite of temperature
c)
c) The temperature of a molecule
d)
d) Energy stored in the chemical bonds in a substance
36.

What is the Heat of Reaction ΔH\Delta H  for this reaction?

a)

-200 KJ

b)

200 KJ

c)

400 KJ

d)

-300 KJ

37.

What type of reaction is this?

a)

Exothermic

b)

Endothermic

c)

Energy Producing

d)

No way to tell

38.

if more heat energy is released in making bonds in the products than is taken in when breaking bonds in the reactants

a)

Exothermic

b)

Endothermic

c)

Exotermic

d)

Endotermic

39.

if less heat energy is released in making bonds in the products than is taken in when breaking bonds in the reactants

a)

Endothermic

b)

Exotermic

c)

Exothermic

d)

Entrothermic

40.
The SI unit of heat and energy is the __________.
a)
calorie
b)
heat
c)
joule
d)
watt
41.
Endothermic reactions feel
a)
warm
b)
cold
42.
Define 'Enthalpy'
a)
a) Energy stored in the movement of molecules in a substance
b)
b) The opposite of temperature
c)
c) The temperature of a molecule
d)
d) Energy stored in the chemical bonds in a substance
43.

What kind of energy is stored energy?

a)

Potential

b)

Kinetic

c)

None of the above

d)

All of the above

44.
What kind of energy is in a moving skateboard?
a)
Potential
b)
Kinetic
c)
Both potential and kinetic energy
d)
none of the above
45.
Energy due to motion is ____________ energy. 
a)
Potential 
b)
Energy
c)
Kinetic
d)
Friction
46.

The minimum energy particles must have to react is the

a)

acting energy

b)

active energy

c)

activation energy

47.

A reaction profile shows....

a)

the relative difference in temperature of reactants and products

b)

the relative difference in amounts of reactants and products

c)

the relative difference in energy of reactants and products

d)

the relative difference in volume of reactants and products

48.

Bond making is

a)

Endothermic

b)

Exothermic

49.

Bond breaking is..

a)

Endothermic

b)

Exothermic

50.

Which letter shows the activation energy

a)

A

b)

B

c)

C

51.

In a reaction the energy required to break bonds is less than the energy released when bonds are made. What type of reaction is this?

a)

Exothermic

b)

Endothermic

52.

Is this showing an endothermic or an exothermic reaction?

a)

Endothermic

b)

Exothermic

53.

Which letter shows the heat change?

a)

A

b)

B

c)

C

d)

D

e)

E

54.

Which letter represents the reactants?

a)

A

b)

B

c)

C

d)

D

e)

E

55.

Which letter represents the products?

a)

A

b)

B

c)

C

d)

D

e)

E

56.

Which letter represents the transition state?

a)

A

b)

B

c)

C

d)

D

e)

E

57.
In an endothermic reaction the system is releasing energy.
a)
True
b)
False
58.
During an endothermic reaction in a beaker if we are part of the surroundings and touched the beaker, it would feel _______. 
a)
Warm
b)
Cold
59.
Baking bread and cooking an egg are examples of....?
a)
Endothermic processes
b)
Exothermic processess
c)
None of these 
60.
Is photosenthysis an Exothermic or an Endothermic reaction?
a)
Endothermic
b)
Exothermic
61.

What type of reaction occurs in a hand warmer?

a)

exothermic

b)

endothermic

62.

Which of the following process is exothermic?

a)

Candle was melting

b)

A puddle evaporating

c)

Dry ice (solid carbon dioxide) subliming to form gaseous carbon dioxide

d)

Water freezing to form ice

63.
ΔH value in an endothermic reaction is a positive number.
a)
True
b)
False
64.
Define 'Enthalpy'
a)
a) Energy stored in the movement of molecules in a substance
b)
b) The opposite of temperature
c)
c) The temperature of a molecule
d)
d) Energy stored in the chemical bonds in a substance
65.

What is the Heat of Reaction ΔH\Delta H  for this reaction?

a)

-200 KJ

b)

200 KJ

c)

400 KJ

d)

-300 KJ

66.

In an endothermic reaction, heat is ...

a)

taken in

b)

given out

67.
If a chemical reaction is EXOTHERMIC, the temperature would....
a)
Stay the same
b)
Increase
c)
Decrease
68.
In an endothermic reaction the system is releasing energy.
a)
True
b)
False
69.
What type of reaction is shown in the photo?
a)
Exothermic
b)
Isothermic
c)
Endothermic
d)
None of the  above
70.
Baking bread and cooking an egg are examples of....?
a)
Endothermic processes
b)
Exothermic processess
c)
None of these 
71.

_____ reactions usually feel hot!

a)

endothermic

b)

exothermic

72.

____ reactions usually feel cold.

a)

endothermic

b)

exothermic

73.

Endo means in or _______.

a)

absorbed

b)

released

74.

What instrument would you use to detect an endothermic or exothermic reaction?

a)

triple beam balance

b)

ruler

c)

thermometer

75.
After you mix two substances together, a new substance forms.  This is an example of:
 
a)
 Physical Change
b)
 Chemical Change
76.
Surrounding temperature gets cold
a)
Endothermic
b)
Exothermic
77.

The graph above is from which type of reaction?

a)

Endothermic reaction

b)

Exothermic Reaction

78.

The graph above is from which type of reaction?

a)

Endothermic reaction

b)

Exothermic reaction

79.
'Have you ever eaten sherbet sweets? They fizz in your mouth and your tongue feels cold. Why do you think that is?'
a)
It is an exothermic reaction
b)
It is an endothermic reaction
c)
It is made of ice
d)
It is dissolving your mouth
80.

Ice melting is an example of (a)   reaction.

81.

In (a)   reactions heat energy is absorbed.

82.

To activate a glow stick, a glass tube containing one solution is cracked inside of a plastic tube containing a different solution. The mixture of these two solutions causes the tube to give off light. This is an example of

a)

an exothermic reaction

b)

an endothermic reaction

c)

a physical change

d)

a reactant

83.

In an exothermic reaction, heat is ...

a)

absorbed from the environment

b)

released into the environment

84.

HCl reacts with Zn giving off heat. What type of reaction is this?

a)

endothermic

b)

exothermic

85.

The initial temperature of the reactants was 20oC, and the final temperature was 45oC. The reaction was

a)

exothermic

b)

endothermic

86.
Which of the following is the best example of conduction?
a)
A light bulb warming a lampshade
b)
An egg cooking in a frying pan
c)
Water boiling in a pot
d)
Gases circulating in the atmosphere
87.
What are waves that can transfer heat through the vacuum of empty space?
a)
Electromagnetic waves
b)
Convection
c)
Conduction
d)
Heat
88.
What is a transfer of heat energy by electromagnetic waves?
a)
Radiation
b)
Convection
c)
Conduction
d)
Heat
89.
What is the transfer of heat by direct contact?
a)
Convection
b)
Electromagnetic waves
c)
Radiation
d)
Conduction
90.
What is the transfer of heat by movement of liquids or gases?
a)
Radiation
b)
Convection
c)
Conduction
d)
Heat
91.

What does heat do when convection currents are moving?

a)

Sinks

b)

Rises

c)

Stays in place

92.

Carole owns a two story house with a heating and cooling unit on each floor. In the winter she mostly uses the downstairs unit to heat the house because the volume of warm air __________ and __________, warming the whole house through __________.

a)

expands and rises, convection

b)

expands and sinks, conduction

c)

contracts and rises, conversion

d)

contracts and sinks, conduction

93.

In heat transfer, heat always flows from the _______________ substance to the _______________ substance.

a)

warmer, cooler

b)

cooler, warmer

94.

A material that does not conduct heat well is called a(n) __________.

a)

conductor (ex. spoon, metals)

b)

insulator (ex. wood, wool, straw, paper)

95.

A material that conducts heat well is called a(n) __________.

a)

conductor (ex. spoon, metals)

b)

insulator (ex. wood, wool, straw, paper)

96.

After cooking an egg in boiling water, you cool the egg by putting it into a bowl of cold water. Which of the following explains the egg’s cooling process?

a)

Hot water moves from the egg to the water.

b)

Cold water moves into the egg.

c)

Energy is transferred from the water to the egg.

d)

Energy is transferred from the egg to the water.

97.

You take a cold can of soda off of a counter top. The counter top underneath the can feels colder than the rest of the counter. Which of the following explains this occurrence?

a)

The cold has been transferred from the soda to the counter.

b)

There is no heat energy left in the counter beneath the can.

c)

Some heat has been transferred from the counter to the soda.

d)

The heat beneath the can moves away into other parts of the countertop.

98.

If you put a metal spoon and a wooden spoon into a pot of boiling water, one will become too hot to touch. Why?

a)

Metals conduct heat better than wood.

b)

Wood conducts heat better than metals.

c)

Metals pull in heat because heat is attracted to metals.

d)

Wood isn’t as strong as metals.

99.

Which of the following is the best example of radiation?

a)

The ocean breeze

b)

The sun heating your body on the beach

c)

Eating ice cream

d)

A wave knocking over a sandcastle

100.

Hot coffee is stirred with a spoon; the spoon gets hot due to __________.

a)

conduction

b)

convection

c)

radiation

101.

Near the ceiling of a room the air is warmer; the warm air rises because of __________.

a)

conduction

b)

convection

c)

radiation

102.

A microwave oven uses which of the following to heat foods?

a)

Microwave elves

b)

Radiation

c)

Convection

d)

Conduction

103.

If two objects have different temperatures, 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

104.

As water in a freezer turns into ice, ___________.

a)

the water absorbs energy from the air in the freezer.

b)

the water absorbs the coldness from the air in the freezer.

c)

the freezer air absorbs heat from the water.

d)

the water neither absorbs nor releases energy

105.

An aluminum plate and a plastic plate have been in the freezer all night long. When you remove them the next morning, __________.

a)

The plates are the same temperature.

b)

The plastic plate has a higher temperature.

c)

The plastic plate has a lower temperature.

d)

The aluminum plate has a lower temperature.

106.
The liquid in a thermometer ______________ as the temperature increases.
a)
expands
b)
disappears
c)
freezes
d)
explodes
107.
Water boils at 212⁰F, which is equivalent to__.
a)
273 K
b)
0⁰ C
c)
100⁰C
d)
37⁰C
108.
Scientists use either the ____ scale or the ____ scale.
a)
celsius, farenheit
b)
farenheit, kelvin
c)
kelvin
d)
celsius, kelvin
109.
The energy transferred between object's at different temperatures
a)
heat
b)
thermal energy
c)
radiation
d)
convection
110.
Thermal energy that flows between an object at a higher temperature to an object at a lower temperature
a)
heat
b)
thermal expansion
c)
insulation
d)
specific heat
111.

If two objects have different temperatures, 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

112.

When a popsicle melts, the particles in the popsicle _____.

a)

gain thermal energy and speed up

b)

there are no particles in popsicles

c)

lose thermal energy and slow down

d)

stay the same

113.
No more energy can be removed from matter at:
a)
its freezing point
b)
0°C
c)
absolute zero
d)
273 K
114.
Heat transfer occurs:
a)
in many directions
b)
both from warm objects to colder ones and from cold objects to warmer ones
c)
only from warm objects to colder ones
d)
only from cold objects to warmer ones
115.
A measure of the average kinetic energy of the individual particles in an object is called:
a)
thermal energy
b)
conduction
c)
convection
d)
temperature
116.
When you touch something that feels cold, 
a)
heat from your hand moves into the cold substance.
b)
coldness moves from the cold substance into your hand.
c)
it melts.
d)
it freezes.
117.
Energy that moves particles of matter is 
a)
temperature
b)
thermal energy
c)
heat
d)
friction
118.
The temperature of a substance increases as___.
a)
the substance expands
b)
the average kinetic energy of its particles increases
c)
the substance's volume increases
d)
the substance's mass increases
119.
The Law of Conservation of Energy states:
a)
Energy can created or destroyed but not transformed 
b)
Energy cannot be created or destroyed, it can only transformed
c)
Energy can't be created, destroyed or transformed
120.

If the particles that make up an object begin to move quickly, their average kinetic energy _____ and the object's temperature _____.

a)

increases, falls

b)

increases, rises

c)

decreases, rises

d)

decreases, falls

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