Describing the behavior of a gas under various conditions
of volume (V), Pressure (P) and absolute or Kevin,
temperature (T).
Boyle's or Mariotte's
gas law states that under constant temperature PV
= k 1.
Charles or GayLussac's law states that
under constant pressure V = k 2 T.
A third law states
that under constant volume P = k 3 T. The constants
k 1, k 2,
k 3 are dependent on the amount of gas present
and respectively, on the temperature, pressure and
volume of the gas.
These three laws can be combined
into a single law, or equation of state PV = kT or
Pv = RT, in which v is the specific volume equal to
V/n, n is the number of moles of the gas, k is a proportionality
constant, and R is the universal gas constant, equal
to 8.3149 + 103 joules/kg-mole-degree in mks units.
These laws are formulated for so-called ideal or perfect
gases.
