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Ideal gas
An
ideal gas
is a
theoretical
gas
composed of many randomly moving
point particles
that do not interact except when they collide elastically. The ideal gas concept is useful because it obeys the
ideal gas law
, a simplified
equation of state
, and is amenable to analysis under
statistical mechanics
. One
mole
of an ideal gas has a volume of
22.7 L at STP as defined by IUPAC
.
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