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Chemistry

Hess's Law

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Notes Enthalpy / Hess?s Law 2/13/13 CH 4(g) + 2O 2(g) ? CO 2(g) + 2H 2 O (g) ?H? rxn =? ?H? rxn = ??H? f products - ??H? f reactants Electron Affinity: Energy change associated with adding electrons to atoms (anions) Ionization Energy: Energy change associated with removing electrons from atoms (cations) Methods for calculating ?H rxn Hess?s Law: if a reaction can be written as the sum of two or more steps the overall enthalpy of reaction is equal to the sums of the enthalpies of reaction for each of the steps A + B ? G + H ? ?H rxn =? A + B ? C + D ? ?H rxn = x KJ C + D ? E + F ? ?H rxn = y KJ E + F ? G + H ? ?H rxn = z KJ +___________ A + B ? G + H ? ?H rxn = x + y + z KJ

Chapter 11 (Industry) AP Human Geography: The Cultural Landscape

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Human Geography
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Nick D?Souza Period 5 Chapter 11 Study Guide Industry is concentrated in three main regions: - Europe, North America, East Asia, ( 3 main) Brazil, and India James Watt patented steam engine in 1769, maker of mathematical instruments in Glasgow, Scotland. Connections: 2 connections are critical in determining the best location for a factory where the markets for the product are located where the resources needed to make the product are located Industrial Revolution: began in the late 1700s in the U.K.; a series of improvements in industrial technology that transformed the process of manufacturing, heavily impacted the industries of iron, coal, transportation, textiles, chemicals, and food processing

Bent Shape of Molecules in Covalent Bonds

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Molecular Shape
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Croque Monsieur 2004, Barefoot in Paris, All Rights Reserved Prep Time: 5 min Cook Time: 25 min Serves: 4 to 8 servings Ingredients 2 tablespoons unsalted butter 3 tablespoons all-purpose flour 2 cups hot milk 1 teaspoon kosher salt 1/2 teaspoon freshly ground black pepper Pinch nutmeg 12 ounces Gruyere cheese, grated (5 cups) 1/2 cup freshly grated Parmesan 16 slices white sandwich bread Dijon mustard 8 ounces baked Virginia ham, sliced Directions Preheat the oven to 400 degrees F.

Metric System Brief Review

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Conversions Regarding the Metric System and some Associated Formulas By Toomuchswag Sources: My Chemistry Notes and http://www.simetric.co.uk/siprefix.htm for some verification Most of the world besides the United States uses the metric system, a much simpler measuring tool according to many. The Metric system works in powers of ten: The prefixes work like this: Kilo Hecto Deca R (this is the regular unit, be it meters, grams, etc. we have given it the letter R) Deci Centi Milli Some important formulas: Density: Mass/Volume 1calorie or cal is the amount of energy required to raise the temperature of water by 1 degree Celsius

esterification

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Esterification reactions 1) salicylic acid + methanol ? methyl salicylate + HOCH3 + H2O H+, heat Note that many of these names have been left as common names 2) salicylic acid + isoamyl alcohol ? isoamyl salicylate + + H2O H+, heat 3) acetic acid + isoamyl alcohol ? isoamyl acetate + H2O H+, heat + 4) propanoic acid + isobutyl alcohol ? isobutyl propionate + H2O H+, heat + For more lessons, visit www.chalkbored.com
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Soda and Mentos Reaction, Lab Report

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Chemistry
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Brandon Shillady Sean Stull Chemistry CP MythBusters Project: Lab Report Mentos + Carbonated Beverage = ? Purpose: The purpose of this MythBuster experiment is to determine whether Coca Cola, Diet Coke, or Carbonated Water produces the biggest explosion once Mentos are added. Hypothesis: If we drop four uncoated Mint Mentos into 2-Liter bottles of Carbonated Water, Coca Cola, and Diet Coke, then the artificial sweetener of the Diet Coke will cause it to produce the highest eruption. Materials: (2) 14-Rolls of Mentos uncoated mint candies (2) 2-Liter bottles of Soda Water (Carbonated Water) (2) 2-Liter bottles of Regular Coca Cola (2) 2-Liter bottles of Diet Coke Video Camera with Tripod Blue painter's tape Tape measure Ladder or Stepping Stool

Soda and Mentos Reaction, PowerPoint Presentation

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Mentos + Carbonated Beverage = ? By: Brandon Shillady and Sean Stull The Big Myth When adding a piece of Mentos candy to a carbonated beverage, out of Carbonated Water, regular Coca Cola, or Diet Coke, Diet Coke should produce the largest reaction. Hypothesis If we drop four uncoated Mint Mentos into 2-Liter bottles of Carbonated Water, Coca Cola, and Diet Coke, then the artificial sweetener of the Diet Coke will cause it to produce the highest eruption. Background Info: Source 1 2 Factors Involved in Mentos & Soda Explosion 1st Component = Soda Provides a Key Reactant of CO2 W/out CO2 from Soda, Bubbles that Form Explosion Would Not Be Formed 2nd Component = Mentos Candy Usually four Mentos Are Put in Each 2-Liter Bottle

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