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Thermochemistry Review

Total questions: 60

Worksheet time: 4hrs 34mins

Name
Class
Date
1.

How does heat move?

a)

from a warmer to a cooler object

b)

from a cooler to a warmer object

c)

toward a hot object

d)

away from a cold object

2.

Energy transmitted by electromagnetic waves

a)

conduction

b)

convection

c)

radiation

3.

__________ is the transfer of heat by the movement of a fluid.

a)

Conduction

b)

Convection

c)

Radiation

4.

When you touch hot sand, heat is transferred by _________ to your skin.

a)

conduction

b)

convection

c)

radiation

5.

Two fluids, one warm and one cold, mix. The warm fluid rises and the cool fluid sinks

a)

Conduction

b)

Convection

c)

Radiation

6.
Transfer of energy between solids by direct contact is:
a)
Conduction
b)
Convection
c)
Radiation
7.
The sun shines down on this family as the play on the beach.
a)
conduction
b)
convection
c)
radiation
8.
The candle will slowly heat the metal and transfer the heat directly to the mans hand.
a)
conduction
b)
convection
c)
radiation
9.
The warm air from this heater creates a current when the warm air rises and the cold air sinks.
a)
conduction
b)
convection
c)
radiation
10.

A huge rock at the state park gets hot during the day. The rock was warmed from the Sun by

a)

conduction

b)

convection

c)

radiation

11.

The Sun's heat reaches the Earth through the vacuum of space.

a)

Radiation

b)

Conduction

c)

Convection

d)

none of these

12.

A toaster oven heats the air inside, creating cycles of hot air that warm food.

a)

Radiation

b)

Conduction

c)

Convection

d)

none of these

13.

You touch a warm light bulb and it burns you.

a)

Radiation

b)

Conduction

c)

Convection

d)

none of these

14.

This flame is hotter than the air around it. Which of the following describes how the heat will be transferred?

a)

The heat will flow from hot to cold

b)

The heat will flow from cold to hot

c)

The heat will flow equally in both directions

d)

none of these

15.

define heat

a)

The transfer of heat by the movement of a fluid

b)

The transfer of heat between two substances that are in direct contact.

c)

Is thermal energy that is transferred from hotter object to a cooler object.

16.

What are the 3 scales of temperature

a)

Fahrenheit

b)

Celsius

c)

Degree

d)

Kelvin

e)

Calvin

17.
Involves heat transfer in LIQUIDS and GASES.
a)
Conduction
b)
Convection
c)
Thermal Heat
d)
Radiation
18.
This heat transfer involves waves in space.
a)
Conduction
b)
Convection
c)
Radiation
d)
Thermal Transfer
19.
Radiation (waves) needs matter (a solid) to pass through.
a)
True
b)
False
20.
What is our primary energy source?
a)
Electricity
b)
Food
c)
Grass
d)
Sun
21.
What type of reaction occurs in a hand warmer
a)
exothermic
b)
endothermic
22.
Exothermic reactions...
a)
Absorb energy
b)
Release energy
c)
Release Color
d)
Absorb Color
23.
In an endothermic reaction, heat is ...
a)
taken in or absorbed
b)
given out or released 
24.
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
25.

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

26.

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

27.

_____ reactions usually feel hot!

a)

endothermic

b)

exothermic

28.

____ reactions usually feel cold.

a)

endothermic

b)

exothermic

29.

Is this endothermic or exothermic?

a)

exothermic

b)

endothermic

30.

What type of reaction is modeled?

a)

endothermic

b)

exothermic

31.

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

32.
The total energy of all the particles in a substance is called: 
a)
temperature
b)
thermal energy
c)
degrees
d)
mass
33.

For a skillet, used for cooking, do you want a high or low specific heat

a)

High, so that it will need more energy to heat up

b)

Low, so that it will change temperature quickly

34.
The SI unit of heat and energy is the __________.
a)
calorie
b)
heat
c)
joule
d)
watt
35.
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
36.
In an exothermic process, the surroundings are gaining energy.
a)
True
b)
False
37.

What does "q" mean?

a)

A measure of heat energy

b)

A change in heat energy

c)

A measure of kinetic energy

d)

A change in temperature

38.

What does "ΔT" mean?

a)

A change in health

b)

A change in heat

c)

A change in height

d)

A change in temperature

39.
Specific heat is....
a)
The measure of kinetic energy of an objects particles
b)
A measure of the energy needed to increase the average kinetic energy of the particles
c)
The heating caused by the motion of flluid due to temperature difference
d)
The transfer of energy by electromagnetic radiation
40.
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)
Medium cup (Venti)
d)
All three are the same temperature so they have the same thermal energy
41.
Copper, Stainless Steel, Carbon Steel, and Zinc were all heated using 10,000 JOULES of thermal energy.  What material would be have the LARGEST change in temperature?
a)
Copper
b)
Carbon Steel
c)
Zinc
d)
Stainless Steel
42.
Copper, Stainless Steel, Carbon Steel, and Zinc were all heated using 10,000 JOULES of thermal energy.  Based on the chart, which material would be have the SMALLEST change in temperature?
a)
Copper
b)
Carbon Steel
c)
Zinc
d)
Stainless Steel
43.
There are 2 pans of water, one has 100 mL in it and one has 1000mL. You add 4000 joules of energy,  which one has the bigger change in temperature?
a)
100 mL
b)
1000 mL
c)
They the same material so they both heat to the same temperature
d)
They both will cool down.
44.
Heat always moves from an object of __________ temperature to an object of _________ temperature.
a)
moderate, high
b)
higher, lower
c)
lower, higher
d)
zero, high
45.
What does temperature measure?
a)
Heat
b)
ºC
c)
Kinetic Energy
d)
Thermal Energy
46.

What letter do we use to represent mass?

a)

Q

b)

m

c)

c

d)

ΔT\Delta T

47.

What letter do we use to represent specific heat?

a)

Q

b)

m

c)

c

d)

ΔT\Delta T

48.
When a computer heats up, do you want computer components that have a high or low specific heat?
a)
High, so that it will not change temperature easily and overheat
b)
Low, so that it will change temperature easily.
49.
The movement of thermal energy from an object at a higher temperature to an object at a lower temperature is called ____________.
a)
thermal
b)
expansion
c)
temperature
d)
heat
50.
The total energy of all the particles in a substance is called: 
a)
temperature
b)
thermal energy
c)
degrees
d)
mass
51.
What is the equation to measure change in Thermal Energy?
a)
Q=mc∆t
b)
Q=mc
c)
Q= ∆mct
d)
m=QC
52.
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°
53.
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
54.
There are 2 pans of water, one has 100 mL in it and one has 1000mL. You add 4000 joules of energy,  which one has the bigger change in temperature?
a)
100 mL
b)
1000 mL
c)
They the same material so they both heat to the same temperature
d)
They both will cool down.
55.
If I have 2 blocks of Aluminium (one of 1kg and one of 10 kg) and heat them up with 6,000 Joules of energy.
Which one will have the SMALLEST change in temperature?
a)
1 kg
b)
10 kg
c)
They both heat up  to the same temperature
d)
It depends on the temperature of the room
56.
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
57.
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
58.

How many Joules of energy are required to change 10 gram of ice at -2 C to water at 20 C? (Specific heat of water is 4.18 J/g°C)

a)
440 J
b)
880 J
c)
10,140 J
d)
66,000 J
59.

What is the change in temperature when 50,000 Joules of energy is added to 200 grams of water at 25 C? (Specific heat of water is 4.18 J/g°C)

a)
0.016 C
b)
1,500 C
c)
63 C
d)
0.4 C
60.

How many Joules of energy are required to change 10 gram of water from 20 C to 90 C? (Specific heat of water is 4.18 J/g°C)

a)
1400 J
b)
2800 J
c)
210,000 J
d)
1,400,000 J

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