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→Statistical mechanics definition 2
where <math>k_B</math> is Boltzmann's constant.
where <math>k_B</math> is Boltzmann's constant.
===Statistical mechanics definition 2===
===Statistical mechanics definition 2 (Gibbs Entropy)===
Label the different states a thermodynamic system can be in by <math>i=1,2,3\ldots N</math>. If the probability of finding the system in state i is <math>p_i</math>, then the entropy is
Label the different states a thermodynamic system can be in by <math>i=1,2,3\ldots N</math>. If the probability of finding the system in state i is <math>p_i</math>, then the entropy is