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WorksheetsPhase Changes - Phase Diagrams
Total questions: 17
Worksheet time: 18mins
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
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