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Ch. 13 Chem

Vocab

TermDefinition
kinetic theory all matter consists of tiny particles that are in constant motion
vacuum an empty space with no particles nor pressure
atmospheric pressure collisions of atoms and molecules in air with objects
barometer device that is used to measure atmospheric pressure
evaporation when vaporization occurs at the surface of a liquid that is not boiling
vapor pressure measure of the force exerted by a gas above a liquid
boiling point temperature at which the vapor pressure of the liquid is just equal to the external pressure on the liquid
normal boiling point boiling point of a liquid at a pressure of 101.3 kPa
melting point temperature at which a solid turns into a liquid
crystal particles are arranged in an orderly repeating, three dimensional pattern called a crystal lattice
unit cell smallest group of particles within a crystal that retains the geometric shape of a crystal
allotropes 2 or more different molecular forms of the same element in the same physical state
amorphous solid lacks an ordered internal structure
sublimation change of a substance from a solid to a vapor without passing through the liquid state
Created by: ash4site
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