chapter 7 review

chapter 7 review - Lecture 6 Chapter 7: Energy &...

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A. Energy capacity to do work (measured in kilojoules or kilocalories) Potential Energy – stored energy Kinetic Energy – energy of motion Chemical Energy – potential energy of chemical bonds; powers many life processes B. Thermodynamics – study of energy Closed System – does not exchange energy with its surroundings Open System – does exchange energy with its surroundings Organism can’t produce energy, but as open systems they can capture it Maintain organization only with input of energy from surroundings 1 s t Law of Thermodynamics energy in the universe is constant; it can’t be created or destroyed but it can be transferred and changed in form 2 nd Law of Thermodynamics during energy conversions, some useful energy is lost as heat, random motion that contributes to entropy, or disorder C. Free Energy As entropy increases, the amount of free energy decreases ΔG = ΔH TΔS G = free energy; H = enthalpy (total potential energy of system) T = absolute temperature (measured in Kelvin); S = entropy Free We can measure, however, the change in free energy Exergonic Reactions free
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This note was uploaded on 01/18/2012 for the course BIO 101 taught by Professor Martin during the Fall '08 term at Rutgers.

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chapter 7 review - Lecture 6 Chapter 7: Energy &...

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