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Ideal Gases
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Ideal Gas Law Molecular Mass, the Mole, and Avogadros Number: Atomic mass unit: 1 u = 1.6605 10-27 kg
the mass per mole (g/mol) of a substance has the same numerical value as the atomic or molecular mass of the substance (in u)
n # of moles N # of particles NA 6.022 1023 mol-1 m mass of sample mparticle mass of particle
A
NnN
= m = mparticle N Mass per mole = mparticle NA
Mass per molemn =
Ideal Gas Law:
8.31 JPV nRT R mol K= = i
231.38 10 JPV NkT k K= =
Boyles law (applies if n and T are constant): i i f fPV P V=
Charles law (applies if n and P are constant): fii f
VVT T
=
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