Phases and Phase Changes

22 terms by hhscience 

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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

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