21 terms

chemistry final vocab 10

kinetic energy
the mechanical energy that a body has by virtue of its motion
a region empty of matter
liquid to gas
melting point
the temperature at which a substance changes from a solid to a liquid
amorphous solid
A solid made up of particles that are not arranged in a regular pattern
(chemistry) a change directly from the solid to the gaseous state without becoming liquid
gas pressure
results from the force exerted by a gas per unit surface area of an object; due to collisions of gas particles with the object
an instrument that measures atmospheric pressure
the process of becoming a vapor
a structurally different form of an element
solids that consist of densely packed atoms arranged at random
atmoshperic pressure
Measure of the pressure of the earth's atmosphere per unit area. It is 760 mm Hg at sea level and decreases with
increasing elevation.
a unit of pressure equal to one newton per square meter
vapor pressure
the pressure exerted by a vapor over a liquid
a rock formed by the solidification of a substance
phase diagram
a graph of the relationship between the physical state of a substance and the temperature and pressure of the substance
kinetic theory
(physics) a theory that gases consist of small particles in random motion
standard atmosphere unit
1 atm=760 mm Hg=760 torr=101.3 kPa
boiling point
the temperature at which a substance changes from a liquid to a gas
unit cell
the smallest group of atoms or molecules whose repetition at regular intervals in three dimensions produces the lattices of a crystal
triple point
the temperature and pressure conditions at which the solid, liquid, and gaseous phases of a substance coexist at equilibrium