Ideal Gases

An ideal gas obeys PV/T = constant or PV/T = P_oV_o / T_o exactly.

P, V, and T are known as "state variables" for specifying two of them fully determines the "state" or condition of an ideal gas.

The ideal gas law can be written as PV = nRT where n specifies how much gas is being considered and R is a universal constant.

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"State variables"

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This is known as the ideal gas law.

N = number of gas molecules

k = Boltzman's constant

k = 1.38 x 10^-23 J/K

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n = number of moles

A mole of gas molecules is Avagadro's number N_A of molecules,

N_A = 6.02 x 10²³

[ N = n N_A ]

R = universal gas constant

R = 8.314 J/mole-K

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For constant pressure, an increase in temperature brings about an increase in volume, according to

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Gases			Kinetic Theory
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(c) 2002, Doug Davis; all rights reserved