Chapter 12 Chem notes

Chapter 12 Chem notes - Chapter 12 Chem notes (12.1,12.5-8)...

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Chapter 12 Chem notes (12.1,12.5-8) No pg 499/other allotropes of carbon, 12.8 up to x-ray diffraction pg 505 Focus on forces *13 qs on final on it Surface tension - Interior molecule have lower energy - Surface tension is the energy, or work, required to increase the surface area of a liquid (y) *j. m - Surface tension decreases as temp increases because the kinetic motion weakens the bonds - Cohesive ( between molecules ex. Drop) Adhesive (liquid/surface ex. Water/glass) - If cohesive>adhesive it maintains shape ex. Water on oily surface - Adhesive>cohesive it spreads from the weight of water ex. Water on table - Detergent 1) dissolves grease 2) lowers surface tension of water ( wetting agents) - Concave(water) /convex (mercury) meniscus: cohesive vs adhesive - Capillary action: interaction of liquid and glass, causes convex/concave formation Viscosity - Liquids resistance to flow ex. Melted metals - Does not affect convexity
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- Decreases with increased temp ex. Honey flows smoother when heated
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Chapter 12 Chem notes - Chapter 12 Chem notes (12.1,12.5-8)...

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