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PS TEST 3 Practice: Heat, Heating curve, Temp

Total questions: 82

Worksheet time: 1hrs 21mins

Name
Class
Date
1.

Where does the ball have the most kinetic energy?

a)

A

b)

B

c)

C

d)

D

2.

What is the height of the object at C?

a)

4.1 m

b)

8.2 m

c)

28 m

d)

None of the above

3.

What is happening to the potential energy of the ball as it is falling

a)

hard to tell

b)

decreasing

c)

staying same

d)

increasing

4.

What is the mass of the object?

a)

5 kg

b)

25 kg

c)

2 kg

d)

None of the above

5.

Where does the object have both potential and kinetic energy?

a)

A

b)

B

c)

B and C

d)

A, B, C, and D

6.

What is the kinetic energy of the object at C?

a)

980 J

b)

200 J

c)

50 J

d)

780 J

7.

A 50 kg object starts from rest at a height 30 m above the ground. Where does the skier have the most speed?

a)

A

b)

B

c)

C

d)

A, B and C

8.

A 50 kg object starts from rest at a height 30 m above the ground. What is the mechanical energy of the object at A?

a)

14700 J

b)

1560 J

c)

14,700 N

d)

None of the above

9.

A 50 kg object starts from rest at a height 30 m above the ground. What is the potential energy of the object at B?

a)

4900 J

b)

1560 J

c)

4900 N

d)

None of the above

10.

A 50 kg object starts from rest at a height 30 m above the ground. The energy graph for the object at B is __________.

a)
b)
11.

How much heat energy does it take to raise the temp of the 0.250 kg water at 1000 C to steam at 1000 C? (Heat of Vaporization = 2260000 J/kg )

a)

565000 J

b)

104,650 J

c)

125,000 J

d)

1043 J

12.

B is heat transfered to the handle. This is an example of heat transfer by_____

a)

conduction

b)

convection

c)

radiation

d)

none of the above

13.

Through which of the following will convection most likely occur?

a)

solids

b)

solids and liquids

c)

solids and gases

d)

liquids and gases

14.

A is heat coming from the heating coils. The pot is not touching the coils. This is an example of heat transfer by_____.

a)

radiation

b)

convection

c)

conduction

d)

none of the above

15.

The transfer of energy that does not require matter is ____.

a)

radiation

b)

convection

c)

conduction

d)

none of the above

16.

Radiation is the transfer of energy in the form of _______.

a)

waves

b)

signals

c)

current

d)

surges

17.

Energy from the sun travels to Earth as ____.

a)

radiant energy

b)

mechanical energy

c)

chemical energy

d)

combustion

18.

C is heat transfered to entire liquid in the pot which is not touching the coils. This is an example of heat transfer by_____.

a)

convection

b)

conduction

c)

none of these

d)

radiation

19.

A metal with a specific heat of 80 J/kg oC requires 900 J of heat to raise its temperature by 4 C. What is its mass?

a)

2.8 Kg

b)

8.2 Kg

c)

3 Kg

d)

100 Kg

20.

Object 10 kg object A at 100 oC is in contact with an 120 kg object B at 100 oC. Heat will

a)

will not flow

b)

flow from A to B

c)

flow from B to A

d)

none of these

21.

Object 10 kg object A at 100 oC is in contact with an 120 kg object B at 1 oC. Heat will

a)

will not flow

b)

flow from A to B

c)

flow from B to A

d)

none of these

22.

When is the ball’s potential energy increasing?

a)

A to D

b)

B to F

c)

D to G

d)

none of these

23.

When does the ball have the most kinetic energy?

a)

A and G

b)

D

c)

B and F

d)

none of these

24.

When does the ball have the most potential energy?

a)

A and G

b)

D

c)

C and E

d)

none of these

25.

A .050 kg of water at 20 oC is mixed with .075 kg of water at 100 oC. The equilibrium temperature of the mixture is 70 oC. (specific heat of water = 4186 J/kg oC). How much heat is gained by the cold water in this experiment?

a)

10,465 J

b)

15,698 J

c)

30,090 J

d)

40 J

26.

A .050 kg of water at 20 oC is mixed with .075 kg of water at 100 oC. The equilibrium temperature of the mixture is 70 oC. (specific heat of water = 4186 J/kg oC). How much heat is lost by the hot water in this experiment?

a)

9,419 J

b)

15,698 J

c)

20,718 J

d)

6,279 J

27.

Gravitational potential energy depends on the ____

a)

the acceleration due to gravity.

b)

the height of the object.

c)

the mass of the object.

d)

All of the above

28.

Thermal energy is measured in units of ____.

a)

Joules (J)

b)

Celsius

c)

Kelvin

d)

Fahrenheit

29.

The S.I unit of temperature is _______.

a)

K

b)

oC

c)

oF

d)

None of these

30.

75 oF = ? oC

HINT: oC = 5/9 (oF -32)

a)

24 oC

b)

42 oC

c)

12 oC

d)

28 oC

31.

_______ is the measure of how hot or cold something is.

a)

Temperature

b)

specific heat

c)

Radiation

d)

Heat

32.

The law of ____ states that energy in a system can change forms but can never be created or destroyed.

a)

conversion of energy

b)

conservation of energy

c)

consecration of energy

d)

construction of energy

33.

As the temperature of a material decreases, the particles move _________ and their kinetic energy __________.

a)

slower ; decreases

b)

slower ; increases

c)

faster ; increases

d)

faster ; decreases

34.

Which of the following can be measured with a thermometer?

a)

temperature

b)

radiation

c)

heat

d)

all of the above

35.

How much heat energy does it take to completely change 8.5 kg of ice cube at 0 oC to water at 0 oC? (Heat of Fusion of ice = 334000 J/kg)

a)

2.84 x 106 J

b)

2,839 J

c)

2.8 J

d)

None of the above

36.

If the velocity of an object triples, the KE of the object will ___________.

a)

increase 9 times

b)

increase 6 times

c)

increase 3 times

d)

decrease 9 times

37.

If the velocity of an object doubles, the KE of the object will ___________.

a)

increase 4 times

b)

increase 2 times

c)

increase 0 times

d)

decrease 4 times

38.

A material that reduces the flow of heat by conduction, convection, and radiation is a(n) ____

a)

insulator

b)

radiator

c)

solar collector

d)

conductor

39.

250 oC = ? oF

HINT: oC = 5/9 (oF -32)

a)

482 oF

b)

171 oF

c)

530 oF

d)

32 oF

40.

A measure of the average kinetic energy of the particles in a sample of matter is its ________.

a)

temperature

b)

heat

c)

kinetic energy

d)

potential energy

41.

A slice of bread contains about 419000 J of energy. If the specific heat of a person is 4190 J/kg·°C, by how many degrees Celsius would the temperature of a 70 kg person increase if all the energy in the bread were converted to heat?

a)

1.43°C

b)

1.86°C

c)

1.00°C

d)

2.25°C

42.

If molecules of a liquid gain enough kinetic energy to break free from intermolecular forces and become a vapor, we call this process ___________. (No heat is supplied)

a)

evaporation

b)

condensation

c)

equilibrium

d)

freezing point

43.

Silver, copper, and nickel are examples of _______.

a)

good conductors

b)

insulators

c)

super conductors

d)

bad conductors

44.

All of the following are good conductors of heat EXCEPT ____.

a)

air

b)

aluminum

c)

silver

d)

copper

45.

Which of the following statements is true?

a)

Heat flows from a higher temperature to a lower temperature.

b)

The amount of heat in a closed system is a constant.

c)

Heat is energy that is flowing into an object

d)

Heat is energy that flows from a lower temperature to a higher temperature.

46.

What is the freezing point of the substance? (Be careful with the units)

a)

333 K

b)

60 K

c)

393 K

d)

283 K

47.

What is happening to the substance at line segment D-E ?

a)

Boiling

b)

melting

c)

condensation

d)

freezing

48.

During which part is melting happening?

a)

B to C

b)

C to B

c)

D to E

d)

E to D

49.

What state is the substance in at line segment E-F?

a)

Gas

b)

Liquid

c)

Solid

d)

Plasma

50.

When is there a change in the potential energy of the molecules (hint: Phase change)? Pick two answers.

a)

BC

b)

DE

c)

EF

d)

AB

e)

CB

51.

When is there an increase in kinetic energy of the molecules? Pick three answers.

a)

AB

b)

CD

c)

EF

d)

DE

e)

BC

52.

What is the boiling point of the substance? (Be careful with the units)

a)

393 K

b)

283 K

c)

393 J

d)

120 J

e)

100 oC

53.
Can heat be created or destroyed?
a)
Yes
b)
No
c)
Only when things are cooling off
d)
Only when things are warming up
54.
When things are hot molecules are moving...
a)
Fast
b)
Slow
c)
They are not moving
d)
They are moving by not fast or slow
55.
When things are cold molecules are moving...
a)
Fast
b)
Slow
c)
They are not moving
d)
They are moving by not fast or slow
56.
Everything has heat
a)
True
b)
False
57.
Heat and Temperature are the same thing
a)
True
b)
False
58.
Heat that is transferred because of touching is called...
a)
Radiation
b)
Conduction
c)
Convection
d)
Reflection
59.
Energy that does NOT need a medium to transfer heat is called...
a)
Radiation
b)
Conduction
c)
Convection
d)
Reflection
60.
Energy that does need a medium (usually air or water) to transfer heat is called...
a)
Radiation
b)
Conduction
c)
Convection
d)
Reflection
61.
Heat passes from...
a)
High to low
b)
Cold to hot
c)
Hot to cold
d)
Heat cannot be passed
62.
What is an insulator?
a)
Something that does NOT absorb heat very well.
b)
Something that absorbs heat.
63.
Why do objects cool down?
a)
All heat will slowly be destroyed.
b)
The cold attacks the heat.
c)
Heat is always transferring so the heat will always move to a cooler place.
d)
The heat disappears.
64.
If the specific heat of water is 4,186 J/kg∙°C, how much heat is required to increase the temperature of 1.2 kg of water from 23 °C to 39 °C? 
a)
-80,371.2 J
b)
44,938.6 J
c)
80,371.2 J
d)
112,575.9 K
65.
What would be the effect on the particles if more heat is supplied to the system?
a)
They would slow down
b)
They would stop moving
c)
They would speed up
d)
There would be no effect
66.
The specific heat is the amount of energy needed to raise the temperature one degree Celsius of 1 gram of a substance.
a)
True
b)
False
67.
What unit do you use to measure Thermal Energy?
a)
J/Kg ºC
b)
Kg
c)
ºC
d)
J
68.
A high specific heat means...
a)
It heats up quickly with energy added
b)
It requires more energy to change temperature
69.
If an object has greater mass, it has greater
a)
Temperature
b)
Thermal Energy
c)
Heat 
d)
All of the above 
70.
My hands feel warm because 
a)
The temperature is cold outside
b)
The molecules are moving
c)
The heat is transferring 
71.
Sum of the kinetic and potential energy of the particles 
a)
Thermal Energy
b)
Temperature
c)
Heat
72.
Movement of thermal energy
a)
Thermal Energy
b)
Temperature
c)
Heat
73.
What line segment represents only the solid state?
a)
A-B
b)
B-C
c)
C-D
d)
D-E
74.
Which segment represents the heat of fusion?
a)
A-B
b)
B-C
c)
C-D
d)
D-E
75.
In which segment is the kinetic energy remaining constant?
a)
A-B
b)
B-C
c)
C-D
d)
E-F
76.
Which process takes the longest to occur?
a)
melting
b)
boiling
c)
freezing
d)
heating the solid
77.
Between which points is the temperature of the substance increasing?
a)
A-B only. 
b)
A-B, C-D, E-F
c)
B-C only. 
d)
B-C, D-E
78.
This type of graph is called a:
a)
Phase diagram
b)
Heating curve
c)
State of matter
d)
Temperature chart
79.

Between which two points is Heat of Vaporization?

a)

A <----> B

b)

B <----> C

c)

C <----> D

d)

D <----> E

e)

E <----> F

80.
A substance's heating curve is shown in the graph.  What is its boiling point?
a)
100 C
b)
60 C
c)
80 C
d)
20 C
81.
The graph shows a cooling curve for an unknown substance.  What is happening during segment DE?
a)
boiling
b)
condensation
c)
freezing
d)
melting
82.

From point A to point E, the sample is going through an

a)

exothermic process by releasing heat to the surroundings

b)

exothermic process by absorbing heat from the surroundings

c)

endothermic process by releasing heat to the surroundings

d)

endothermic process by absorbing heat from the surroundings

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