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Unformatted text preview: B I O L O G Y 1 2 2 3 30-Dec-09 Gardiner 1 BIOENERGETICS BIOENERGETICS Chapter 4 B I O L O G Y 1 2 2 3 30-Dec-09 Gardiner 2 Textbook Chapter 4 Pages 71 to 78 B I O L O G Y 1 2 2 3 30-Dec-09 Gardiner 3 Bioenergetics Bioenergetics The study of energy energy in living systems living systems (environments) and the organisms organisms (plants and animals) that utilize it. B I O L O G Y 1 2 2 3 30-Dec-09 Gardiner 4 Potential Energy Potential Energy Energy Energy that matter occupies matter occupies because of its location, arrangement, or position location, arrangement, or position. Energy Energy of position of position. Examples: Examples: 1. 1. Water behind a dam Water behind a dam 2. 2. Chemical energy (gas) Chemical energy (gas) Kinetic Energy Kinetic Energy Energy Energy in the process of doing work process of doing work. Energy Energy of of motion motion . Examples: Examples: 1. 1. Heat Heat 2. 2. Light energy Light energy SUN Figure 4.1 B I O L O G Y 1 2 2 3 30-Dec-09 Gardiner 9 Systems Matter under study Open Ecosystem Cell Plant, Animal, etc Closed Planet Earth Isolated System Thermos bottle B I O L O G Y 1 2 2 3 30-Dec-09 Gardiner 10 First Law of Thermodynamics First Law of Thermodynamics Energy Energy cannot be created created or or destroyed destroyed , but only converted converted to other forms. This means that the amount of energy in the universe universe is is constant constant . B I O L O G Y 1 2 2 3 30-Dec-09 Gardiner 11 Second Law of Second Law of Thermodynamics Thermodynamics All energy transformations energy transformations are inefficient inefficient because every reaction...
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- Fall '09