Boltzmanns entropiformel: Forskelle mellem versioner

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'''Boltzmanns entropiformel''' er inden for den [[statistiske mekanik]] en central formel, der forbinder et systems [[entropi]] <math>S</math> med antallet af mulige [[mikrotilstand]]e <math>\Omega</math>.
:<math>S=k_{\text{B}}\ln \Omega</math>
hvor <math>\ln</math> er den [[naturlige logaritme]], mens <math>k_{\text{B}}</math> er en proportionalitetskonstant kaldet [[Boltzmanns konstant]]. Formlen gælder, når hver mikrotilstand er lige sandsynlig.<ref name="blundell 148">{{cite book |last1= Blundell |first1= Stephen J. |authorlink1= |last2=Blundell |first2= Katherine M. |authorlink2= |coauthors= |editor1-first= |editor1-last= |editor1-link= |others= |title= Concepts in Thermal Physics |url= https://archive.org/details/conceptsthermalp00blun_990 |edition= 1. |year= 2006 |publisher= Oxford University Press |location= |language= engelsk |isbn= 978-0-19-856770-7 |page= [https://archive.org/details/conceptsthermalp00blun_990/page/148 148] |chapter= 14 Entropy}}</ref>
 
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