Lecture_15 - Zumdahl Chapter 10 Liquids and Solids GASES...

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1 Zumdahl Chapter 10 Liquids and Solids GASES •F lu id • Compressible • Have low density • Completely fill container • Isotropic SOLIDS • Dense • Incompressible • Anisotropic ANISOTROPY Different atomic environments of the stress vectors. The response is not the
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2 REVEALING FACTS H 2 O (s) H 2 O (l) H ° fus = + 6.02 kJ/mol H 2 O (l) H 2 O (g) H ° vap = + 40.7 kJ/mol GAS d H2O (g) = 3.26 × 10 4 g/cm 3 at 1.00 atm and 400 ° C = 0.157g/cm 3 at 242 atm and 400 ° C LIQUID d H2O (l) = 0.997 g/cm 3 at 1.00 atm and 25 ° C = 1.05 g/cm 3 at 1065 atm and 25 ° C Liquids and solids show many similarities: d H2O (l) = 0.9971 g/cm 3 d H2O (s) = 0.9168 g/cm 3 GENERALLY: the volume of a solid increases by ~ 4% upon melting. Appreciable change Almost no change LIQUIDS Like SOLIDS • dense • incompressible Like GASES • fluid • isotropic
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3 GASES • Weak (or no) intermolecular forces • Molecules are in constant random motion
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This note was uploaded on 09/07/2010 for the course FAS chem 201 taught by Professor Sultan during the Summer '07 term at American University of Beirut.

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Lecture_15 - Zumdahl Chapter 10 Liquids and Solids GASES...

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