Chapter 12-Liquids,Solids,gases

Chapter 12-Liquids,Solids,gases - Mass/volume • Mass I...

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Chapter 12- Liquids, Solids, and Intermolecular Forces Phase Diagram o Triple Point- Solid, liquid, gas together o Pressure (y) vs. Temp (x) o Critical Point-Mixture of liquid and gas. . Cant differentiate o Solid,liquid,gas o Isotherm- vertical constant temp o Isobar-horizontal constant pressure Vapor Pressure o Use ideal gas law o Density may be hidden d= M(molar mass)*Pressure/ (R*T) Crystal Structures o Sc= length: 2r UC: 1 Coordinate #: 6 o Bcc= length: 4r/√3 UC: 2 Coordinate #: 8 o Fcc and hcp= length: r√8 UC: 4 Coordinate #: 12 o Volume is l^3 o May be asked to find density
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Unformatted text preview: Mass/volume • Mass- I atom/unit cell * (1mol/avagadro's #) * (g/mol) • Volume- volume converted to cm^3 • Clausius Claperon o Plug and chug • Phases o Liquid<--> Gas Boiling, condensation-∆H vap o Liquid<--> Solid melting, freezing -∆H fus o Solid<-->Gas Sublimination, deposition -∆H sub • Forces o Dipole: permanent o London: instantaneous, induced o H-bond strongest. N,O, F + H o Stronger= greater surface tension, viscosity, and boiling point o Stronger= lower vapor pressure o If both london then look at smaller...
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