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chemistry vocab 10
vocab list 10
27
Chemistry
11th Grade
12/01/2011

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Term
absolute zero
Definition
zero on the Kelvin scale, which represents the lowest possible theoretical temperature; atoms are all in the lowest possible energy state
Term
amorphous solid
Definition
a substance with a haphazard, disjointed, and incomplete crystal lattice
Term
boiling point
Definition
the temperature of a liquid where its vapor pressure equals the pressure exerted on its surface
Term
Brownian motion
Definition
the constant, random motion of tiny chunks of matter
Term
condensation
Definition
the process where gaseous particles come together, that is, condense, to form a liquid or sometimes a solid
Term
crystal lattice
Definition
the three-dimensional arrangement repeated throughout a solid
Term
deposition
Definition
the energy-releasing process by which a substance changes from a gas or vapor to a solid without first becoming a liquid
Term
diffusion
Definition
the process by which a gas enters a container and fills it, or when the particles of two gases or liquids mix together
Term
evaporation
Definition
the process by which particles of a liquid form a gas by escaping from the liquid surface
Term
freezing point
Definition
the temperature of a liquid when it becomes a crystal lattice
Term
gas
Definition
a flowing, compressible substance with no definite volume or shape
Term
heat of fusion
Definition
the energy released as one kilogram of a substance solidifies at its freezing point
Term
heat of vaporization
Definition
the energy absorbed when one kilogram of a liquid vaporizes at its normal boiling point
Term
ideal gas
Definition
a gas in which the particles undergo elastic collisions
Term
joule
Definition
the SI unit of energy; the energy required to lift a one-newton weight one meter against the force of gravity
Term
kelvin (K)
Definition
a division on the Kelvin scale; the SI unit of temperature
Term
Kelvin scale
Definition
the temperature scale defined so that temperature of a substance is directly proportional to the average kinetic energy of the particles and so that zero on the scale corresponds to zero kinetic energy
Term
kinetic theory
Definition
the theory that states that submicroscopic particles of all matter are in constant, random motion
Term
liquid
Definition
a flowing substance with a definite volume but an indefinite shape
Term
liquid crystal
Definition
a material that loses its rigid organization in only one or two dimensions when it melts
Term
melting point
Definition
the temperature of a solid when its crystal lattice begins to break apart
Term
plasma
Definition
an ionized gas
Term
pressure
Definition
the force acting on a unit area of a surface
Term
solid
Definition
a substance in which the particles occupy fixed positions in a well-defined, three-dimensional arrangement
Term
sublimation
Definition
the process by which particles of a solid escape from its surface and form a gas
Term
temperature
Definition
the measure of the average kinetic energy of the particles that make up a material
Term
vapor pressure
Definition
the pressure of a substance in equilibrium with its liquid
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