'Activation energy' diaporamas de présentation

CATALYSIS

CATALYSIS. Definition of catalysis. A substance which changes the speed of a reaction without being used itself is called a catalyst. The phenomenon of increasing the rate of reaction by the use of catalyst is called catalysis.

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TRANSITION METALS

TRANSITION METALS. Transition metal characteristics of elements Sc ? Cu arise from an incomplete d sub-level in ions. So in Transition metals when forming ions they lose the 4s electrons before the 3d. Unusual Electron Configurations for Cu and Cr

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Cellular Metabolism

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Diffusion

Diffusion. Chapter 5. Mechanics of Diffusion. Primary method by which atoms mix Consider a drop of food coloring in a glass of water. Atoms are always in motion. Bulk motion Random motion of individual atoms Vibration. Where does Diffusion Occur in Crystals?. Through Interstitial Spaces

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Chapter 6 Chemistry in Biology

Chapter 6 Chemistry in Biology. Section 1: Atoms, Elements, and Compounds. Section 2: Chemical Reactions. Section 3: Water and Solutions. Section 4: The Building Blocks of Life. Chemistry in Biology. Chapter 6. 6.1 Atoms, Elements, and Compounds. Atoms.

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Chapter 6 Chemistry in Biology

Chapter 6 Chemistry in Biology. Section 1: Atoms, Elements, and Compounds. Section 2: Chemical Reactions. Section 3: Water and Solutions. Section 4: The Building Blocks of Life. Chemistry in Biology. Chapter 6. 6.1 Atoms, Elements, and Compounds.

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Chapter 20 Carboxylic Acid Derivatives Nucleophilic Acyl Substitution

Chapter 20 Carboxylic Acid Derivatives Nucleophilic Acyl Substitution.

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Reaction Rates and Equilibrium

Reaction Rates and Equilibrium. Chapter 17. Collision Theory or Model. Molecules react by colliding with each other with enough energy and proper orientation to break bonds, rearrange and form new bonds

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Energy management within cells

Energy management within cells. Lecture 6. Controlled Pathways. The various compartments of the cell ( - what are they?) are populated with a very large number of chemical reagents, products, and enzymes. How does the cell control them all?. Reagents > Enzymes > Products.

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Lingo

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An Overview of Reaction Rate

An Overview of Reaction Rate. Factors Affecting Reaction Rate:. 1. the nature of the reactant. Hey, some reactions are just slow. 2. concentration of the reactant. rate = k [A] x [B] y. 3. temperature (Arrhenius equation).

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Kinetics and the Virtual Molecular Dynamics Lab

Kinetics and the Virtual Molecular Dynamics Lab. Kinetics Made Easy Susan Grillo Jay Chandler Dan Burton. Introduction. This is a traditional kinetic unit which incorporates Simulabs as a supplement.

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Si x Ge 1-x and Si x Ge 1-x O y Films as a Thermal Sensing Material

Si x Ge 1-x and Si x Ge 1-x O y Films as a Thermal Sensing Material. Mukti Rana and Donald Butler University of Texas at Arlington Electrical Engineering Dept. Arlington, TX 76019 Based in part by work supported by the National Science Foundation ECS-0322900.

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Enzymes

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Reaction Rates

Reaction Rates. AP chapter 14.3. Reaction Rates. Describe how quickly concentration of reactants or products are changing Units typically D M/ D t for aqueous reactants and products Could be units of D P/ D t for gaseous products

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Chapter 6 Chemical Reactions and Quantities

Chapter 6 Chemical Reactions and Quantities. 6.9 Energy Changes in Chemical Reactions. Reaction Conditions. Reaction conditions for a chemical reaction require collisions between reacting molecules collisions with sufficient energy to break the bonds in the reactants

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Kinetics

Kinetics. The Rates and Mechanisms of Chemical Reactions. SC4. Obtain, evaluate, and communicate information about how to refine the design of a chemical system by applying engineering principles to manipulate the factors that affect a chemical reaction.

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Catalysis

Catalysis. Catalyst : A substance that speeds up a reaction without being consumed Enzyme : A large molecule (usually a protein) that catalyzes biological reactions. Homogeneous catalyst : Present in the same phase as the reacting molecules.

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3.7 Energy Distribution

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