Cl 2 - PowerPoint PPT Presentation
TOPIC 5 ENERGETICS/THERMOCHEMISTRY
TOPIC 5 ENERGETICS/THERMOCHEMISTRY. 5.3 BOND ENTHALPIES. ESSENTIAL IDEA. Energy is absorbed when bonds are broken and is released when bonds are formed. NATURE OF SCIENCE (2.2)
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Balancing Equations
Balancing Equations. Chapter 6. What is balancing an equation?. Balancing an equation is changing the ratios of molecules/atoms to make the lowest possible same whole number and type of atoms on each side of the equation. Na + Cl 2 NaCl. 2. 2.
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ELECTROCHEMISTRY AS
ELECTROCHEMISTRY AS. Redox reactions Oxidation : loses electrons/oxidation number increases /loses hydrogen/accepts oxygen Reduction : accepts electrons/oxidation number decreases /accepts hydrogen/loses oxygen Calculation of oxidation numbers. APPLICATIONS OF ELECTROLYSIS
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Nitroglycerine
1mol Nitro 227 g Nitro. 29 mol gas 4mol Nitro. Nitroglycerine. 100 g Nitro. = 3.193 mol gas. Or = .110 mol O 2 = .661 mol N 2 = 1.10 mol H 2 O = 1.32 mole CO 2. 1atm. Nitroglycerine. V = nRT/P. PV = nRT. 3.193 mol. 425 C. 698 K. (0.082057 L atm/mol K). V =.
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Basics of Chemical Bonding
AP Chemistry. Basics of Chemical Bonding. Properties of substances are largely dependent on the bonds holding the material together. Basics of Bonding. A chemical bond occurs when atoms or ions are strongly attached to each other. Ionic bonds involve the transfer of e – and the
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Chapter 8: Covalent Bonding Resources: Chapter 8 of our TB and unit 6 of workbook
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Chapter 5 - Ionic Bonding
Chapter 5 - Ionic Bonding. Bonds. Chemical bond - forces of attraction that hold atoms together. The molecule is more stable than the separate ions/ atoms. Bond energy - the energy required to break (or form) a chemical bond. Energy is released when the bond is formed.
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Equilibrium
Equilibrium. Reactions are reversible. A + B C + D ( forward) C + D A + B (reverse) Initially there is only A and B so only the forward reaction is possible As C and D build up, the reverse reaction speeds up while the forward reaction slows down. Eventually the rates are equal.
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III. Moles/Stoichiometry
III. Moles/Stoichiometry. In all chemical reactions there is a conservation of mass, energy, and charge. Matter cannot be created nor destroyed, only changed from one form to another Energy cannot be created nor destroyed, only changed from one form to another.
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Chemical Reactions
Chemical Reactions. Unit 3 Enloe High School. Law of Conservation of Mass. During physical or chemical changes matter is neither created nor destroyed. Chemical reactions do involve the separation, combination, or rearrangement of atoms. Mass of products = mass of reactants
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CHAPTER 15 Chemical Equilibrium
CHAPTER 15 Chemical Equilibrium. Equilibrium Consider a system consisting of a mixture of gases at some temperature T where the following general and reversible chemical reaction is taking place. a A(g) + b B(g) c C(g) + d D(g)
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Reaction Types
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Types of Chemical Reactions
Types of Chemical Reactions. Aim: What are the five general types of reactions?. 5 Types of Chemical Reactions. synthesis Decomposition Single Replacement Double Replacement Combustion. #1 - Synthesis Reactions. Combine = put together
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Chemistry 121 Winter 17
Introduction to Organic Chemistry and Biochemistry Instructor Dr. Upali Siriwardane (Ph.D. Ohio State) E-mail: upali@latech.edu Office : 311 Carson Taylor Hall ; Phone: 318-257-4941 ; Contact me trough e-mail if you have questions. Chemistry 121 Winter 17.
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Water Treatment 4. Softening
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Check for Understanding-Whiteboard
Check for Understanding-Whiteboard. Name the following: Cr 2 O 3 FeO NiCl 2 S 3 Cl 6 HI HNO 3 Write the chemical formula for the following: Iron (III) Oxide Calcium Nitride Diphosphorus hexaiodide Carbonic acid Hydrochloric acid. Stoichiometry. Ch. 3. Lab A Partners.
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Enthalpy and Hess’s Law
Enthalpy and Hess’s Law. From the homework, you may have realized that H can have a negative number. It relates to the fact that energy as heat has either entered or left the system. If it was positive , it meant that the heating of the sample required energy.
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Physical Chemistry
Physical Chemistry. §25−1 Electrode Polarization (1) Polarization & Overpotential Electrical energy Chemical energy Eg. in electrolysis of saturated NaCl, E = 3.5 V ( E reversible = 2.17 V ). Galvanic cell. Electrolytic cell.
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LES BATTERIES Lionel ROUÉ Institut National de la Recherche Scientifique
LES BATTERIES Lionel ROUÉ Institut National de la Recherche Scientifique Département Énergie, Matériaux et Télécommunications Varennes, Québec, CANADA. Sommaire. Historique Le marché des batteries Concepts de base Les facteurs influençant les performances d’une batterie
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