Ch_11-1_solids_and_liquids_Ellis3

Ch_11-1_solids_and_liquids_Ellis3 - GASES LIQUIDS AND...

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Unformatted text preview: GASES, LIQUIDS, AND SOLIDS MOTIONAL ENERGY VERSUS ENERGY OF ATTRACTION GASES, LIQUIDS, AND SOLIDS 1. 2. 3. 4. 5. 6. DIFFUSION IN A SOLID Na + Na + Cl- F- Ca 2+ F- r r 1 2 Q Q E k r = REVIEW LATTICE ENERGY (QUALITATIVE) Melting Point of Some Ionic Compounds NaF 993ºC CaF 2 1423ºC MgO 2800ºC NaCl 801ºC Na 2 S 1180ºC CaO 2580ºC NaBr 747ºC K 2 S 840ºC BaO 1923ºC KCl 770ºC For more detailed review see Ch 9 Mainly Ionic Compounds Dipole-dipole interactions in polar molecules Attractive forces –-A— Repulsive forces -–R— Molecules orient so the attractive forces are stronger than the repulsive forces. Hydrogen Bonding—Very Strong Dipole-Dipole Interaction H 2 O C H 3 C H 2 O H N H 3 H + N, O, or F H must be bonded to N, O, or F and then hydrogen bonding occurs with N, O or F. London Forces— Exist between all molecules (Dipole-Induced Dipole Forces, Dispersion Forces, and van der Waals Forces) g Temperature ºC Boiling Substance Molar mass Electrons Boiling Point (ºC) Fluorine (F 2 ) 38 18-188 Chlorine (Cl 2 ) 71 34-35 BOILING POINTS OF MAINLY NONPOLAR SUBSTANCES Bromine (Br 2 ) 160 70 59 Iodine chloride (ICl) 162 70 97 Iodine ( I 2 ) 254 106 184 Blue—only London forces ; Black—London forces + dipole-dipole forces Viscosity...
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This note was uploaded on 11/23/2010 for the course CHEM 005 taught by Professor Ellis during the Spring '08 term at NJIT.

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Ch_11-1_solids_and_liquids_Ellis3 - GASES LIQUIDS AND...

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