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22 terms

Phases and Phase Changes

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solid
of definite shape and volume
liquid
a substance in the fluid state of matter having no fixed shape but a fixed volume
gas
phase of matter that has no definite shape or volume
melting
changing from a solid to a liquid
freezing
changing from liquid to solid
vaporization
the change from a liquid to a gas
condensation
the changing of a gas into a liquid
sublimation
change from a solid directly to a gas
melting point
the temperature at which a substance changes from a solid to a liquid
freezing point
the temperature at which a substance changes from a liquid to a solid
boiling point
the temperature at which a substance changes from a liquid to a gas
cohesive force
An attractive force between molecules of the same substance
absolute zero
The coldest temperature, 0 Kelvin, that can be reached. It is the hypothetical temperature at which all molecular motion stops.
Boyle's Law
The relationship between the pressure and volume of a gas at constant temperture; when volume increase, pressure decreases. Inverse
Charles' Law
the relationship between volume and temperature of a gas and constant pressure; when volume increases, the temperature increases. Direct.
Gay-Lussac's Law
The relationship between pressure and temperature of a gas; when pressure increases, temperature increases. Direct
Boiling
Vaporization that occurs throughout a liquid
Evaporation
vaporization that takes place at the surface of a liquid
General Properties of Matter
mass, weight, and volume
Special Properties
used to differentiate one type of matter from another
Chemical Properties
describes how a substance changes into a new substance, either by combining with other elements or by breaking apart into new substances, includes reactivity and flammability
Physical Properties
characteristics of a substance that can be observed or measured without changing the substance into something else