CHEM 201 - 11.2.07

CHEM 201 - 11.2.07 - If ΔH< 0 exothermic o T temperature...

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CHEM 201 – November 2, 2007 Properties of Liquids o Viscosity – resistance to flow o Surface Tension – resistance to spread and increase in surface area Phase Changes o Solid Liquid Melting/fusion o Liquid Solid Freezing o Liquid Gas Evaporation/vaporization o Gas Liquid Condensation o Solid Gas Sublimation o Gas Solid Deposition Gibb’s Free Energy Equation o ΔG = ΔH – TΔS o If ΔG < 0, spontaneous o If ΔG = 0, equilibrium o If ΔG > 0, not spontaneous o ΔH heat of reaction If ΔH > 0, endothermic
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Unformatted text preview: If ΔH < 0, exothermic o T temperature in Kelvin o ΔS entropy (disorder in the system) ΔS > 0, more disorder ΔS < 0, less disorder Molar Heat Capacity o Amount of energy required to raise the temperature of one mol of substance 1°C (1K) Heat Constants for Water o ΔH fusion = 6.01 kJ/mol o ΔH vaporization = 40.67 kJ/mol o ΔH sublimation = ΔH fusion + ΔH vaporization Vapor Pressure o Increases with temperature in a exponential fashion...
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