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WorksheetsChemical Energy Review
Total questions: 34
Worksheet time: 1hrs 8mins
Name
Class
Date
1.
What state of matter is X?
a)
solid
b)
liquid
c)
gas
d)
supercritical fluid
2.
What state of matter is Y?
a)
solid
b)
liquid
c)
gas
d)
supercritical fluid
3.
What state of matter is Z?
a)
solid
b)
liquid
c)
gas
d)
supercritical fluid
4.
What is point A?
a)
triple point
b)
critical point
c)
equilibrium point
d)
normal melting point
5.
What is point B?
a)
triple point
b)
critical point
c)
equilibrium point
d)
normal melting point
6.
What change occurs from F to E?
a)
sublimation
b)
deposition
c)
melting
d)
condensation
7.
What change occurs from E to C?
a)
sublimation
b)
freezing
c)
melting
d)
boiling
8.
What change occurs from C to D?
a)
condensation
b)
vaporization
c)
melting
d)
sublimation
9.
The pressure is increased on a sample of water at 0 °C from 0 mmHg to 800 mmHg. In order, what changes occur?
a)
deposition, melting
b)
sublimation, melting
c)
condensation, freezing
d)
deposition, freezing
10.
What is true regarding CO2 for temperatures above 31 °C?
a)
It can never be liquified.
b)
It decomposes.
c)
It has a high pressure.
d)
It is a plasma.
11.
What would happen to the liquid substance if the pressure were decreased until a phase change occurred? It would undergo...
a)
melting
b)
vaporization
c)
condensation
d)
sublimation
12.
What is the normal boiling point of this substance?
a)
150 °C
b)
100 °C
c)
-50 °C
d)
0 °C
13.
What is the normal melting point of this substance?
a)
150 °C
b)
100 °C
c)
-50 °C
d)
0 °C
14.
Water exists as a _____________ at 700 mmHg and 50 °C.
a)
solid
b)
liquid
c)
gas
d)
supercritical fluid
15.
Water exists as a _____________ at 3 mmHg and 50 °C.
a)
solid
b)
liquid
c)
gas
d)
supercritical fluid
16.
Above the temperature and pressure of point B, this substance exists as a ____________.
a)
solid
b)
liquid
c)
gas
d)
supercritical fluid
17.
What would happen if the gaseous substance with a pressure of 10-3 atmospheres were cooled until a phase change occurred?
a)
condensation
b)
vaporization
c)
sublimation
d)
deposition
18.
What line segment represents only the solid state? (Diagram F)
a)
A-B
b)
B-C
c)
C-D
d)
D-E
19.
Between which points is the temperature of the substance remaining constant? (Diagram F)
a)
A-B only.
b)
A-B, C-D, E-F
c)
B-C only.
d)
B-C, D-E
20.
True or false: melting and freezing occur at the same temperature!
a)
True
b)
False
c)
I don't know
21.
A substance's heating curve is shown in the graph. What is its boiling point? (Diagram B)
a)
100 C
b)
60 C
c)
80 C
d)
20 C
22.
Are the particles moving faster or slower as time goes on? (Diagram F)
a)
Faster
b)
Slower
23.
How long does it take this substance to change from a liquid to a gas? (Diagram E)
a)
1 minute
b)
2 minutes
c)
10 minutes
d)
15 minutes
24.
What phase change is occurring at line segment B-C if the graph is exothermic? (Diagram E)
a)
melting
b)
freezing
c)
boiling
d)
condensation
25.
At higher temperatures
a)
particles in an object have less energy
b)
particles in an object move faster
c)
a gas contracts
26.
What does temperature measure?
a)
Heat of Molecules
b)
ºC
c)
Average Kinetic Energy of Molecules
d)
Thermal Energy
27.
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
28.
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
29.
What is the symbol for Thermal Energy in the specific heat formula?
a)
Q
b)
t
c)
m
d)
C
30.
What unit do you use to measure Thermal Energy?
a)
J/Kg ºC
b)
Kg
c)
ºC
d)
J
31.
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
32.
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
33.
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.
34.
lowest possible temperature on the Kelvin scale
a)
boiling point
b)
insulation
c)
absolute zero
d)
heat
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