CHM 2046 Chapter Notes - Chapter 18: Thermodynamics, Lead, Sodium Chloride

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16 Apr 2014
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Section 18. 2 spontaneous change and equilibrium. Pb (s ) + 2 ag + (aq) pb 2 + + ag (s ) D euniv = d esys + d esurr = 0 i. e. , d esys and d esurr cancel each other out \ the first law of thermodynamics energy (e) cannot be created or destroyed. Chapter 6? (p = pressure, v = volume) H = e + pv. Increasing the dispersal of energy or matter over more energy states corresponds to an increase in entropy e. g. dispersing (spreading) energy over more atoms represents an increase in entropy (think of a hot metal in contact with a cold one the heat will be spread out spontaneously). e. g. dispersing (spreading) matter over a bigger volume represents an increase in entropy (think of a gas in one container distributing between it and an empty container when connected).

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