Lecture 5 - Thermodynamics & Intro to Metabolism

Lecture 5 - Thermodynamics & Intro to Metabolism -...

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9.19.07 Thermodynamics and Kinetics
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Wha t a re  the s e  thing s ?    Ho w b ig  a re  the y?
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m ic ro tub ule  (25 nm  dia m e te r)  with a  ve s ic le  (~ 100 nm ) g o lg i a ppa ra tus   (~ 0.5  μ m ) c e ntrio le s    (~ 0.25  μ m  dia m e te r)
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Thermodynamics and Kinetics
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whic h re a c tio ns  ha ppe n o n the ir o wn? whic h re a c tio ns  re q uire  e ne rg y input? wha t de te rm ine s  the  s pe e d o f a  re a c tio n? thermodynamics kinetics
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Salt dissolves spontaneously salt crystal Is dissolved salt energetically more favorable than salt crystal?
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energy kinetic energy potential energy mass a property of individual atoms and molecules (E = mc 2 )
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first law of thermodynamics conservation of energy The total energy in the universe cannot change. E (universe) = a constant or: E (universe) = 0
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entropy Entropy measures the degree of disorder inherent in an ensemble of molecules. A property of an ensemble of atoms and molecules
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Consider a mole of oxygen:
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Consider a mole of oxygen:
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Consider a mole of oxygen: LOW ENTROPY – (NOT VERY RANDOM…)
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Consider a mole of oxygen: HIGHER ENTROPY – (MORE RANDOM…)
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Consider a mole of oxygen: MAXIMAL ENTROPY – (MOST RANDOM…)
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increase of entropy The total entropy of the universe cannot decrease. S
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This note was uploaded on 04/29/2008 for the course BIO V23.0011 taught by Professor Fitch during the Spring '08 term at NYU.

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Lecture 5 - Thermodynamics & Intro to Metabolism -...

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