Lecture 7 - Lecture 7: Nov 11/10 Bacterial cells slide Free...

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Lecture 7: Nov 11/10 Bacterial cells slide Free energy = enthalpy + entropy o Enthalpy heat or radiant energy lost or gained in a reaction A- B + energy (releases heat) is exothermic E + C D is endothermic o Entropy randomness, molecules are the most free and vibrating condition Nature likes more randomness Less energy in ordered molecules than in scattered ones Ordered molecules usually requires more energy input Free energy = G (Gibbs free energy) Enthalpy= H Entropy = S G = H-TS (t is temp. in degrees kelvin) deltaG = deltaH –TdeltaS large energy transfer (glucose to oxygen) is done in steps to protect the organism. O2 is the most efficient. Chemolithotrophs live where most others can’t, because they can use things that aren’t organic o Are all prokaryotic (archaea or bacteria) o Ex. Helicoloacter pylori (in stomach and creates ulcers) Hydrogenase – oxidizes H2
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Lecture 7 - Lecture 7: Nov 11/10 Bacterial cells slide Free...

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