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Section 4: Phase Changes

Phase Changes

1.

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According to the phase diagram for CO2, what is the critical point for carbon dioxide?
A)-100
B)-78
C)-45
D)31
2.
The phase change that describes the direct conversion of a solid into a gas is _______.
A)vaporization
B)sublimation
C)melting
D)deposition
3.
Which of the following phase changes will release energy during the transition?
A)vaporization
B)condensation
C)sublimation
D)melting
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
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