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Heat Math Review

Total questions: 70

Worksheet time: 2hrs 20mins

Name
Class
Date
1.

What is the formula to calculate heat energy required to raise the temperature of any substance?

a)

Q = m C ∆T

b)

Q = m C

c)

Q = ½ m v

d)

m = Tfinal - Tinitial

2.
There are four cups of hot cocoa. The cup sizes are shown. The temperature of the cocoa in each cup is 25 degrees celsius. Which cup has the MOST thermal energy?
a)
Large cup (Trenta)
b)
Small cup (Tall)
c)
Venti
d)
All three are the same temperature so they have same thermal energy
3.
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
4.

Heat transfers from ______ objects to cold objects.

a)

Cold

b)

Hot

c)

larger

d)

smaller

5.

1. 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

6.

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

a)

-80.256 J

b)

80.256 J

c)

80.256 J/g∙°C

d)

-80.256 J/g∙°C

7.

Which water molecules have the greatest kinetic energy?

a)

Ice at 0 °C.

b)

Water at 373 K.

c)

Water at 98 °C

d)

Steam at 150 °C.

8.

Which of the following describes Convection?

a)

The transfer of heat through liquids and gases

b)

The transfer of heat through electromagnetic waves (rays)

c)

The transfer of heat between two objects in direct contact with one another

9.

Which of the following describes Radiation?

a)

The transfer of heat through liquids and gases

b)

The transfer of heat through electromagnetic waves (rays)

c)

The transfer of heat between two objects in direct contact with one another

10.

Which of the following examples represents Conduction?

a)

A person holding a hot cup of coffee

b)

The sun heating the sidewalk

c)

A person warming their hands above a fire

11.

Which of the following examples represents Convection?

a)

A person holding a hot cup of coffee

b)

A pot of boiling water

c)

A person warming their hands above a fire

12.

Which of the following examples represents Radiation?

a)

A person holding a hot cup of coffee

b)

A pot of boiling water

c)

A person warming their hands above a fire

13.

Fill-in the blank: A person gets sunburned due to ______________ from the sun.

a)

Conduction

b)

Convection

c)

Radiation

14.

Boiling Water

a)

Conduction

b)

Convection

c)

Radiation

15.

Curling Iron

a)

Conduction

b)

Convection

c)

Radiation

16.

Sun Bathing

a)

Conduction

b)

Convection

c)

Radiation

17.

Cooking pizza in the microwave is an example of...

a)

conduction

b)

convection

c)

radiation

18.
The specific heat of aluminum is 0.21 cal/g°C.  How much heat(Q) is released when a 10 g piece of aluminum foil is taken out of the oven and cools from 100° to 50°?
a)
105 J
b)
10.5 J
c)
1.05 J
d)
50 J
19.
20 g of water. specific heat of water is 4.18 J/g°C.  temperature changes from 25° C to 20° C, how much heat energy (Q) moves from the water to the surroundings?
a)
418 Joules
b)
209 J
c)
83 J
d)
4.18 J
20.
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 of copper?
a)
12.82 °C
b)
24.12°C
c)
351 °C
21.
What is the change in temperature when 50,000 Joules of energy is added to 200 grams of water at 25 C?
a)
0.016 C
b)
1,500 C
c)
63 C
d)
0.4 C
22.
How many Joules of energy are required to change 10 gram of water from 20 C to 90 C?
a)
1400 J
b)
2800 J
c)
210,000 J
d)
1,400,000 J
23.
How much liquid water can you change 20 C if you apply 20,000 J?
a)
500 g
b)
100,000 g
c)
250 g
d)
350 g
24.

The specific heat of platinum is 0.133 J/g°C. How much heat(Q) is released when a 10 g piece of platinum cools from 100°C to 50°C?

a)

66.5 J

b)

665 J

c)

0.0266 J

d)

0.665 J

25.
What is the equation to measure change in Thermal Energy?
a)
Q=mc∆t
b)
Q=mc
c)
Q= ∆mct
d)
m=QC
26.
How many Joules of energy are required to change 10 gram of ice at -2 C to water at 20 C?
a)
440 J
b)
880 J
c)
10,140 J
d)
66,000 J
27.
How does heat flow?
a)
Always from cold to warm
b)
Always from warm to cold
c)
Both warm to cold & cold to warm
d)
It depends on the temperature
28.
A high specific heat means...
a)
It requires less energy to change temperature
b)
It requires more energy to change temperature
c)
It heats up very quickly
29.
Which of the following would be the best insulator?
a)
air
b)
aluminum
c)
copper
d)
silver
30.
When a  piece of aluminum foil is taken out of the oven and cools from 100° C to 50°C, What is the change in temperature?
a)
50°
b)
0°
c)
100°
d)
150°
31.
How many Joules of energy are required to make 100 grams of ice at 0 C completely melt?
a)
200 J
b)
400 J
c)
30,000 J
d)
2,000,000 J
32.

You hold a bowl of hot soup that warms your hands; this is

a)

A. Radiation

b)

B. Conduction

c)

C. Convection

d)

D. Conviction

33.

Heat transfer is also called...

a)

Thermal Energy

b)

Conduction

c)

Convection

d)

Radiation

34.

This picture is an example of...

a)

Conduction

b)

Convection

c)

Radiation

35.

When heat energy moves in a liquids or gases it is called...

a)

Conduction

b)

Convection

c)

Radiation

36.
What is the symbol for Thermal Energy?
a)
Q
b)
T
c)
m
d)
Cp
37.
The baby chickens are kept warm from the heat lamps.
a)
conduction
b)
convection
c)
radiation
38.
Warm air rises and the cool air sinks.
a)
conduction
b)
convection
c)
radiation
39.
The symbol for specific heat is .......
a)
c
b)
Q
c)
m
d)
t
40.

What is the formula to calculate heat energy required to raise the temperature of any substance?

a)

Q=mc∆t

b)

Q=mc

c)

Q= ½mv

d)

m=QC

41.
A material was cooled from 100ºC to 40ºC.  What is the temperature change?
a)
60ºC
b)
40ºC
c)
-60ºC
d)
-40ºC
42.
What does temperature measure?
a)
Heat
b)
ºC
c)
Kinetic Energy
d)
Thermal Energy
43.

What is Specific Heat?

a)

The amount of thermal energy required to increase the temperature of 1 g of a material by 1 degree Celsius.

b)

The amount of radiant energy required to increase the temperature of 1 g of a material by 1 degree Fahrenheit.

c)

The amount of energy required to increase the temperature of 1 kg of a material by 1 degree Kelvin.

d)

The amount of friction required to increase the temperature of 1 kg of a material by 1 degree.

44.

Using the heat equation, what would the formula look like if we were solving for change in temperature?

a)

Q m=∆T c

b)

Q/mc= ∆T

c)

Qm/c=∆T

d)

mcQ=∆T

45.

The unit(s) for specific heat is/are

a)

J

b)

g

c)

℃

d)

J/g℃

46.

Using the heat equation, what would the formula look like if we were solving for specific heat?

a)

q=mcΔT

b)

q=c/mΔT

c)

c=qmΔT

d)

c=q/mΔT

47.

How do you calculate ΔT?

a)

Tinitial -Tfinal

b)

Tfinal -Tinitial

c)

Tinitial - Tstart

d)

Tfinal- T end

48.
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
49.

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

50.
What is a tool that measures the heat of chemical reactions?
a)
calorimeter
b)
 calorie
c)
Styrofoam™ cup
d)
none of these
51.
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.
52.

What does "ΔT" mean?

a)

A change in health

b)

A change in heat

c)

A change in height

d)

A change in temperature

53.

The total amount of energy of all the particles in a substance is called________________.

a)

temperature

b)

thermal energy or heat

c)

degrees

d)

mass

54.

The standard unit of heat and energy is the __________.

a)

grams

b)

heat

c)

joule

d)

watts

e)

milliliters

55.

The specific heat of water is 4.18 J/g°C.

If 980. J of energy is added to 6.20 g of water at 18.0 °C, what is the final temperature of the water?

a)

37.8 °C

b)

-19.8 °C

c)

19.8 °C

d)

55.8 °C

56.

A metal cube at temperature of 70°C is immersed in water at temperature of 20°C. The metal _______ heat while the water __________ heat.

a)

gains, loses

b)

loses, gains

57.
A high specific heat means...
a)
It heats up quickly with energy added
b)
It requires more energy to change temperature
58.
Heat transfers from ______ objects to cold objects. 
a)
Cold
b)
Hot
c)
Convection
d)
Radiation 
59.

What causes your skin to feel warm when it is in the sun on a summer day?

a)

Particles in the atmosphere reflect energy from the Sun downward

b)

The Sun radiates energy that passes through space & the atmosphere to your skin.

c)

Hot particles from the Sun still carry some heat when they reach your skin.

d)

The solar wind carries heated air from the Sun’s atmosphere to Earth’s surface.

60.

Which best describes the flow of heat?

a)

A. From a larger object to a smaller object

b)

From a cooler object to a warmer object

c)

From a warmer object to a cooler object

d)

From a warmer object to a warmer object

61.

You hold a bowl of hot soup that warms your hands; this is

a)

A. Radiation

b)

B. Conduction

c)

C. Convection

d)

D. Conviction

62.

Steam from a hot bowl of soup warms your face as you lean over it; this is

a)

A. Radiation

b)

B. Conduction

c)

C. Convection

d)

D. Conviction

63.

Jim wakes up early in the morning and walks from his carpeted bedroom to the tiled kitchen. Which BEST describes why, despite being the same temperature, the tile floor feels cooler to his feet than the carpet?

a)

A. Tile is a better conductor of heat and transfers heat away from his skin.

b)

B. Carpet is a bad conductor of heat and transfers heat to his skin.

c)

C. Tile is a poor conductor of heat and transfers heat to his skin.

d)

D. The tile and carpet are the same temperature

64.

This picture is an example of...

a)

Conduction

b)

Convection

c)

Radiation

65.

This picture is an example of...

a)

Conduction

b)

Convection

c)

Radiation

66.

A type of heat transfer that does not rely on physical contact of substances is called...

a)

Conduction

b)

Convection

c)

Radiation

67.

This picture is an example of...

a)

Conduction

b)

Convection

c)

Radiation

68.

This picture is an example of...

a)

Conduction

b)

Convection

c)

Radiation

69.

The higher the temperature the higher the...

a)

Kinetic Energy

b)

Potential Energy

c)

Sound Energy

d)

Chemical Energy

70.

The more heat the more the particles...

a)

Stay in a fixed psoition

b)

Vibrate

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