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Phase Changes
General Science
10
Science
9th Grade
10/07/2008

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Cards

Term
What is a phase change?
Definition
A reversible physical change. A substance changes from one state to another.
Term
What happens to the temperature of a substance as it undergoes a phase change?
Definition
The temperature remains the same even though heat is being added.
Term
The freezing point of a substance is the same as it's ________ ______.
Definition
The freezing point of a substance is the same as it's melting point.
Term
Energy is either _____ or ______ during a phase change.
Definition
Energy is either absorbed or released during a phase change.
Term
Energy is absorbed during an _____ change.
Definition
Endothermic.
Term
Energy is released during an _____ change.
Definition
Exothermic.
Term
What is the heat of fusion?
Definition
The amount of energy absorbed to melt a substance.
Term
In what phase (S/L/G) are the molecules of a substance more orderly?
Definition
Solid phase.
Term
Name the next six phases:
1) Ice to liquid
2) Liquid to ice
3) Solid to gas
4) Liquid to gas
5) Gas to liquid
6) Gas to solid
Definition
1) Melting
2) Freezing
3) Sublimating
4) Vaporization
5) Condensation
6) Deposition
Term
What is the heat of vaporization?
Definition
The amount of energy absorbed to change a liquid into a gas.
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