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Perfect Gas
Law
PV=nRT
P=Pressure in atmospheres
V=Volume
in litres
n=Number
of moles
R=Gas
constant (0.0821 litre-atmospheres / K / mole)
T=Temperature in K
If
constant pressure V1/V2 = T1/T2
If
constant temperature P1/P2 = V2/V1
If
constant volume P1/P2 = T1/T2
Boyle’s Law
If temperature is
kept constant, the volume of a given mass of gas is inversely
proportional to the pressure which is exerted upon it.
Initial Pressure Final Volume
---------------- = --------------
Final Pressure Initial Volume
Charles’ Law
If the pressure is
constant, the volume of a given mass of gas is directly proportional
to the absolute temperature.
Initial Volume Final Volume
--------------------- = -------------------
Initial Temperature K Final Temperature K
Dalton’s Law of Partial Pressures
The pressure which is
exerted on the walls of a vessel is the sum of the pressures which
each gas would exert if it were presemt alone.
PV = V (p1
+ p2 … pn)
Graham’s Law of Diffusion
Relative rates of
diffusion of two gases are inversely proportional to the square root
of their densities.
Avagadro’s Law
Equal volumes of
gases, measured under the same conditions of temperature and
pressure, contain equal numbers of molecules.
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