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29 Cards in this Set
- Front
- Back
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Example of living joule apparatus
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animal and plants
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Rank the quality energy: Sunlight, heat, work, chemical bond
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Sunlight : chemical bond: high energy
heat: low energy |
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The quality depends on how much is free is coined by ?
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Gibbs ( quite guy), PHD in engineering, statistical physics.
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Enthalpy (H)
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The total energy of a system
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Free Energy (G)
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available energy
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Entropy (S)
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disorder
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G = H- TS
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Well, please don't confuse me. but Bush bashing ? well, that is some sass
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dG = changes in in free energy
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determines the spontaneity of the system
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dG= dH - TdS
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Well, old friend !
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For an isolated system
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change in enthalphy is equal to 0
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cream & coffee
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spontenity due to increase in disorder
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Energy can be released to drive a chemical reaction.
Or heat can be released |
just a statement
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delta H for exothermic reaction ?
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duh, negative !
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dG < 0
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reacion is spontaneous
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Well the 4 classical cases to determine the energy level
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sure
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Delta G not: Standard free energy
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they are additive.
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Delta G is a state function
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intermediate is not important
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RAte constant
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rate(forward) = k[A][B]
Rate ( backward0= k[C][D] |
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What is k(eq) ?
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Keq = Kfoward/ K(reverse)
Keq > 1, forward rxn favours |
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DeltaG = -RTlnK(eq)
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Talks about the graph !
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Ah, the freaking equation to calculate for deltaG (using log)
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deltaG = -1362logK (eq)
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How cells capture ATP ?
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what is free energy ?
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Why burn ATP ?
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Drive unfavorable reactions.
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Making of Glutamine from Glutamic acid
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require ATP
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Minimizing free energy
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there are overall decays in flow of energy
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Catalysis
Sign of delta G, conversion |
Catalyst favors both forward and reverse reaction , and sign of delta G sometimes does not indicate the rate at which a rxn occurs.
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Some enzymes are better than other !
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Different affinity
Different rate of catalytic activity |
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The catalytic site of digestive enzymes is a model for catalysis : Trypsin
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Whatver
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Why Trypsin ?
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Easy to get from the cow pancreas
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