C161l34_11_26 - Parts of a phase diagram Solid-gas line This pressure represents the vapor pressure of the solid at that temperature Triple point

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Parts of a phase diagram Parts of a phase diagram W Solid-gas line This pressure represents the vapor pressure of the solid at that temperature W Triple point Solid, liquid and gas all exist in equilibrium at this temperature and pressure W Liquid-gas line Vapor pressure of liquid W Solid-liquid line (melting point) W Critical temperature Temperature above which liquid doesn’t exist Above crit. temp., pressure supercritical fluid (SCF)
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More complicated phase More complicated phase diagrams diagrams W Not every substance has only 3 phases Carbon has 3 distinct solid forms: Diamond Graphite Amorphous W Each phase will appear in the phase diagram.
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Example Example
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Intermolecular Forces Intermolecular Forces W Why are liquids liquid? W Why is water a liquid at room temperature, while propane is a gas? W A first guess: size matters! 50 60 70 80 90 100 110 120 130 30 40 50 60 70 80 Mass BP -100 -50 0 50 100 150 20 30 40 50 60 70 80 Alcohols Alkanes Amines
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The forces The forces W Intramolecular forces hold a molecule together
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This note was uploaded on 04/06/2011 for the course CHEMISTRY 161 taught by Professor Seigel during the Fall '10 term at Rutgers.

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C161l34_11_26 - Parts of a phase diagram Solid-gas line This pressure represents the vapor pressure of the solid at that temperature Triple point

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