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Chem_215_Lect_20_Color

Chem_215_Lect_20_Color - PS 6 Due Friday Prelim 1 Handed...

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1 PS 6 Due Friday Prelim 1 Handed Back Last Friday
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2 The Concept of Entropy (S) Entropy is proportional to the number of microstates corresponding to a given state (including position and energy) S = k ln Ω Ω = the number of microstates accessible to system k = Boltzmann constant = R/N A
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3 Δ S is based on two measurable quantities: q rev = heat absorbed by system in a reversible process T = temperature of system in Kelvin T S , Change ntropy E rev q = Δ A reversible expansion process: - “infinitesimally small” grains of sand are removed one at a time. - adding one grain at any time would reverse process.
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