Chapter 6

Chapter 6 - Chapter 6 Chapter 6 Energy Flow in Cells What...

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Unformatted text preview: Chapter 6 Chapter 6 Energy Flow in Cells What is Energy? Energy = the capacity to do work a. Kinetic energy = energy of movement i. Light ii. Heat iii. Electricity b. Potential energy = stored energy i. Chemical energy i. Batteries ii. Positional Laws of Thermodynamics 1 st Law: Conservation of energy: amount of energy in a system remains constant 2 nd Law: When converted from one form to another, useful energy decreases-Entropy (a measure of disorder) increases low entropy high entropy Energy Flow on Earth Photoautotrophs (Plants, other producers) Heterotrophs (consumers, decomposers) Energy input from the sun Energy output (mainly heat) How Does Energy Flow in Chemical Reactions? 1. Chemical reaction : forming and breaking chemical bonds among atoms 2. Reactants: starting materials 3. Products: result of the reaction Exergonic Reactions A B Energy Released C D + + High Energy Reactants Low Energy Products Exergonic Reactions Energy Released + + High Energy Reactants Low Energy Products OH O O CH 2 OH O O O O C O H H Endergonic Reactions A B + C D + Low Energy Reactants High Energy Products energy Endergonic Reactions + Low Energy Reactants + High Energy Products O H O O CH 2 OH O O O O C O H H Energy Supplied Exergonic Reactions (Fig. 6-2a)Exergonic Reactions (Fig....
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Chapter 6 - Chapter 6 Chapter 6 Energy Flow in Cells What...

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