CHEM 1110 Lecture Notes - Lecture 4: Sodium Chloride, Ion, Covalent Bond
31 Jan 2017
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Document Summary
Critical point: temperature at which you can no longer compress gas regardless of pressure. Line: boiling point of 100 c at 1 atm. 1 atm: 25 c: liquid, 100 c: gas. Triple point: solid liquid gas at . 01c at . 006 atm. Triple point is higher because carbon dioxide goes straight to gas more often. Solubility of one substance in another depends on. Gas liquid: club soda: co2 and water. Mixing: involves enthalpy change and entropy increase. Solubility in liquids and solids mean weak im forces. Increases when solvent and solute mix to form solution. Energy changes in formation of most solutions involve differences in attractive forces btw particles. Energetics of solution formation: enthalpy of a solution. Overcome attractions among solute particles: h solute is endothermic. Overcome attractions among solvent molecules: h solvent is endothermic. New attractions among solute and solvent: h mix is exothermic. Overall h for solution depends of relative sie of hh for three processes.
