L16-Chemical_Reactions_and_Stoichiometry - Part III...

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Unformatted text preview: Part III Chemical Reactions and Stoichiometry: Phase Changes, Solutes and Solubility Heating Curve of Water ☛ each Fat segment represents a phase change ● energy released is due to formation of intermolecular bonds ● width of the Fat segments and slopes of the lines depend on the amount of the substance Phase Changes liquid solid freezing melting gas evaporation condensation solid gas deposition sublimation Phase Diagrams phase diagrams illustrations of the equilibrium pressure- temperature relationships between different phases of a pure substance in a closed system 1 2 3 4 Phase Diagram of Carbon Dioxide ☛ solid lines: two phases are in equilibrium with each other ● phase transitions ☛ triple point (point A) : the temperature and pressure that all three phases are in equilibrium with each other ☛ critical point (point C): the highest temperature and pressure where liquid and gas phases coexist • above the temp. at this point (the critical temp.), substance can’t be liquiFed; a supercritical...
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This note was uploaded on 09/24/2009 for the course CHEM 333 taught by Professor Baird during the Spring '09 term at UC Davis.

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L16-Chemical_Reactions_and_Stoichiometry - Part III...

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