Chapter 6 Matter and Energy

Chapter 6 Matter and Energy - Chapter 6 Matter and Energy...

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Chapter 6 Matter and Energy Chapter 6 Matter and Energy I. Basics a. Matter is anything that takes up space and has mass. i. The physical material of the universe. b. Energy is the capacity to do work. II. There are 2 major categories of energy: a. Potential energy i. Energy stored in matter because of its position or location ii. Potential energy in biological systems can be stored in chemical bonds. b. Kinetic energy i. Energy of motion III. The Laws of Thermodynamics Describe the Properties of Energy a. Energy transfer by organisms is subject to two laws of thermodynamics. i. First Law of Thermodynamics—which states that energy can be transferred and transformed, but it cannot be created or destroyed (i.e., the energy of the universe is constant). ii. Second Law of Thermodynamics—which states that every energy transfer or transformation makes the universe more disordered (i.e., every process increases entropy at the cost of useful energy) 1. Entropy is the measure of disorder, randomness. iii. Examples on pg. 100 IV. If every energy transfer loses usable energy, why doesn’t life on the planet simply run out of energy? a. The planet isn’t a closed system. b. Energy is constantly flowing in from the sun. c. A closed system is a system which is completely isolated from its surroundings. d.
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This note was uploaded on 05/04/2010 for the course BIOL 1001 taught by Professor Minor during the Fall '08 term at LSU.

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Chapter 6 Matter and Energy - Chapter 6 Matter and Energy...

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