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Formelsamling B-niveau projekt [pdf] - sorenr.dk

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November 2003 <strong>Formelsamling</strong> Fysik B-<strong>niveau</strong> Side 28<br />

10 Ideale gasser<br />

Stofmængde i mol<br />

Antallet af molekyler:<br />

Antal mol:<br />

N = NA ⋅ n<br />

Antal molekyler N [antal]<br />

Avogrados tal<br />

NA 23<br />

= 6,022⋅ 10<br />

1<br />

mol −<br />

⎡<br />

⎣<br />

⎤<br />

⎦<br />

Stofmængde n [mol]<br />

m<br />

n = M Molmasse M<br />

Husk hvis det ikke er en ædelgas skal M ganges med 2.<br />

Tilstandsligningen for ideale gasser<br />

⎡ g ⎤<br />

⎢mol ⎥<br />

⎣ ⎦<br />

Masse m [ kg ]<br />

Tryk p [Pa], [ bar ] , [ atm ]<br />

p⋅V = n⋅R⋅ T Volumen V<br />

3<br />

[L], [m ]<br />

Stofmængde n [mol]<br />

Temperatur T [ ° K]<br />

Gaskonstant R k<br />

= 8,314<br />

3<br />

Pa, m<br />

( )<br />

( )<br />

( )<br />

= 0,08314 L, bar<br />

=<br />

0,08206 L, atm

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