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Exam 1 review Lockett Precepts-1

Exam 1 review Lockett Precepts-1 - Review EXAM 1 These are...

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Review: EXAM 1 These are from Dr. Lockett’s TA’s. you may have some problem with animations if you don’t have Quicktime. Use what you can. Dr.W
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INTENSIVE vs. EXTENSIVE Properties Intensive properties DO NOT depend on the amount of material CHARACTERISTIC of a material Extensive properties Depend on the amount of material Independent of the type or identity of the material
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INTENSIVE or EXTENSIVE? Boiling Point Molar Mass Density Volume Area Mass Melting Point Color Length Surface Area
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INTENSIVE or EXTENSIVE? Boiling Point intensive Molar Mass intensive Density intensive Volume extensive Area extensive Mass extensive Melting Point intensive Color intensive Length extensive Surface Area
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What about density?! When 2 extensive properties are divided, the result is an intensive property. D=m/v INTENSIV E EXTENSIV E EXTENSIVE
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Multiple Choice Problems Which of the following is an extensive property of a smoothie? A) total mL of milk B) density of smoothie C) color D) boiling point E) percent sugar
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Multiple Choice Problems Which of the following is an extensive property of a smoothie? A) total mL of milk B) density of smoothie C) color D) boiling point E) percent sugar
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Multiple Choice Problems Which is an intensive property of a glass of water? A) number of oxygen atoms B) density of the water C) surface area D) mass
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Multiple Choice Problems Which is an intensive property of a glass of water? A) number of oxygen atoms B) density of the water C) surface area D) mass
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Separation Methods Distillation : separation based on difference in boiling point Ex) Distillation of fermented solutions is used to produce distilled beverages with a higher alcohol content.
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Separation Methods Extraction : separation based on differences in solubility . Ex) Acid extraction is suitable to treat soils contaminated with heavy metals.
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Separation Methods Filtration : separation based on differences in the size of particles. Ex) Used in chemical synthesis to separate solids from liquids.
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Separation Methods Chromatography : separation of substances based on polarity. different attractions between mobile and stationary phases. Ex) Used in labs to separate pigments Recall: spinach lab Thin Layer Chromatography (TLC)
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Multiple Choice Problems In the following picture, which is the correct method of separation? A) chromatography B) extraction C) distillation D) filtration T=290K P=1atm Boiling point of water= 100C Boiling point of hexane= 80.7C Boiling point of nitrogen= -196C
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Multiple Choice Problems In the following picture, which is the correct method of separation?
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