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chem vocab

Chapter 13 chem vocab

kinetic energy the energy an object has because of it's motion
kinetic theory all matter consists of tiny particles that are in constant motion
Gas Pressure results from the force exerted by a gas per unit surface aread of an object
vacuum an empty space with no particles and no pressure
atmospheric pressure results from the collisions of atoms and molecules in air with objects
barometer a device that is used to measure atmospheric pressure
pascal (Pa) the SI unit of pressure
standard atmosphere (atm) one atm is the pressure required to support 760 mm of mercury in a mercury barometer at 25 degrees C
vaporization the conversion of a liquid to a gas or vapor
Vapor pressure a measure of the force exerted by a gas above a liquid
boiling point (bp) the temperature at which the vapor pressure of a liquid is just equal to the external pressure on the liquid.
normal boiling point the boiling point of a liquid at a pressure of 101.3 kPa
melting point (mp) the temperature at which a solid changes into a liquid
crystal the particles are arranged in an orderly, repeating, three-dimensional pattern called a crystal lattice
unit cell the smallest group of particles within a crystal that retains the geometric shape of the crystal
allotropes two or more different molegular forms of the same element in the same physical state
Created by: imjustmiixo