Section 13.4
Phase Changes
Practice Test
1.
According to the phase diagram for CO
2
, what is the critical point for carbon dioxide?
a.
-100
b.
-78
c.
-45
d.
31
Hint
2.
The phase change that describes the direct conversion of a solid into a gas is _______.
a.
vaporization
b.
sublimation
c.
melting
d.
deposition
Hint
3.
Which of the following phase changes will release energy during the transition?
a.
vaporization
b.
condensation
c.
sublimation
d.
melting
Hint
4.
The point on a phase diagram where the solid state, the liquid state, and the gas vapor state can coexist is _________.
a.
the pressure point
b.
the absolute zero point
c.
the critical point
d.
the triple point
Hint
