lecture26_chem110_sas

lecture26_chem110_sas - Liquids, Phase Diagrams, and Phase...

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Unformatted text preview: Liquids, Phase Diagrams, and Phase Changes CH110 FA11 SAS 1 Prepare for Recitation October 27 th ALEKS Objective 9 due October 25 th ANGEL Quiz 9, October 27 th Lecture 25: October 19 th Lecture 26: October 21 st Lecture 27: October 24 th Read: Ch. 18.1-18.4,5.5,11.3-11.6 Additional Preparation: BLB 18 : 9,11,15,29,69 Packet 18 : 1-3 BLB 11 : 31,33,37,39,43,47,50; Packet 11 : 5-13 CH110 FA11 SAS 2 By the end of Todays Lecture you should know: Viscosity and surface tension Cohesive and adhesive forces Phase changes Heat capacity calorimetry KEY QUESTIONS: THE BIG PICTURE Liquids, Phase Diagrams, and Phase Changes What dominates in liquids: intermolecular forces or kinetic energy? What properties do we use to describe the liquid phase? What types of compounds tend to be found as liquids at STP? Remember: macroscopic properties come from microscopic origins What is the origin of viscosity and surface tension? How do cohesive and adhesive forces help us understand liquids? How do the properties of liquids change as a function of temperature? How does Kinetic Energy relate to Intermolecular Forces? CH110 FA11 SAS 3 How can a molecule overcome attractive intermolecular forces (IMF)? Gas: Liquid: Solid Energy IN ( ___________ ): Solid Liquid Gas Energy OUT ( __________ ): Gas Liquid Solid Phase Changes and Temperature CH110 FA11 SAS 4 Solid Liquid Gas Kinetic Energy of System sublimation vaporize condense deposition melting (fusion) freezing Endothermic: Exothermic: Structure Affects Physical Properties CH110 FA11 SAS 5 CH 3 CH 2 CH 2 CH 2 CH 3 36C hydrocarbon (72 amu) aldehyde (72 amu) 75C CH 3 CH 2 CH 2 C H O CH 3 CH 2 C CH 3 O ketone (72 amu) 79C ether (74 amu) 34C CH 3 CH 2 OHC 2 CH 3 ester (74 amu)...
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lecture26_chem110_sas - Liquids, Phase Diagrams, and Phase...

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