Chapter 6 - Chapter 6: Energy and Metabolism Energy The...

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Chapter 6: Energy and Metabolism
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Energy The capacity to do work Kinetic Energy Energy of motion Potential Energy Stored energy How do we convert potential to kinetic energy?
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Heat, the silent killer Most energy is lost as heat 85% of light is lost as heat Think car breaks Thermodynamics – heat change Kilocalorie (kcal) = 1000 calories Calorie = heat required to change 1 gram of water 1 degree Centigrade
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The sun, one hot statistic The sun Provides 13 x 1023 calories per year 40 million billion calories per second
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Potential what? The sun can convert stuff into things CO 2 into Sugar (C 6 H 12 O 6 ) Potential energy in covalent bonds Breaking bonds requires energy 98.8 kcal to break one mole (6.023x10 23 ) of the C-H bonds found in organic molecules That’s a lot of energy yo
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Redox Oxidation – loss of an electron Reduction – gain of an electron Reduction = increase in potential energy
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Bring on the law 1 st law of thermodynamics Energy cannot be created or destroyed Energy has to transfer once place or the other Earth is not a closed system – heat loss
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This note was uploaded on 04/22/2008 for the course BIOL 1105 taught by Professor Jrcowles during the Fall '06 term at Virginia Tech.

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Chapter 6 - Chapter 6: Energy and Metabolism Energy The...

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