Einstein, Albert.
'Eine Theorie der Grundlagen der Thermodynamik'.
Annalen der Physik,
9
(1903)
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e
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= konst. sein muß, sodaß
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also für eine stationäre </
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d N = konst. dp1...dpn
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dafür,
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daß die Werte der Zustandsvariabeln eines zufällig heraus-
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gegriffenen der
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Systeme, in dem unendlich kleinen, innerhalb
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der angenommenen Energiegrenzen gelegenen Gebiete
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der
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Zustandsvariabeln gelegen sind, der </
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integral dW = konst. dp1...dpn. g
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ganze in Betracht kommende, durch die angenommenen Energie-
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grenzen bestimmte Gebiet der Zustandsvariabeln in
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Teil-
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gebiete
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derart, </
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integral integral integral = = ... = , g1 g2 gl
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<
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,
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etc. die Wahrscheinlichkeiten
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dafür, daß die Werte der Zustandsvariabeln des beliebig heraus-
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gegriffenen Systems in einem gewissen Zeitpunkt innerhalb
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<
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liegen, so </
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1 W1 = W2 = ...= Wl = l.
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bestimmten dieser Gebiete
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ist also genau ebenso wahr-
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scheinlich, als das Zugehören zu irgend einem anderen dieser
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betrachteten
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Systeme zu einer zufällig herausgegriffenen Zeit
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zum Ge-
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biete
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,
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zum Gebiete
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<
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zum Gebiete
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gehören,
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ist also </
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(1)N N! W = l e-! e!-... e-!, 1 2 n
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<
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">oder auch, da
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als sehr große Zahlen zu denken </
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e sum =l log W = konst. - e log e. e=1
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