BCH 361 Exam 1 Ch 4

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djwon1
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262330
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BCH 361 Exam 1 Ch 4
Updated:
2014-02-17 00:11:32
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ch 4
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  1. The goal of thermodynamics is to predict whether a reaction will occur ___, which in a chemical sense, means it will ___.
    • spontaneously
    • continue without energy input once started
  2. First Law of Thermodynamics
    Energy is neither created nor destroyed but can be transformed.
  3. Second Law of Thermodynamics
    With a spontaneous reaction, the entropy of the universe increases.
  4. In a spontaneous reaction
    • free energy decreases, DG is negative energy
    • is released by the reaction reaction is said to be exergonic
  5. In a non-spontaneous reaction
    free energy increases, DG is positive energy is absorbed by the reaction reaction is said to be endergonic
  6. ATP drives several processes
    • Biosynthesis of biomolecules
    • Active transport across membranes
    • Mechanical work (e. g. muscle contraction)
    • Can carry phosphoryl groups from higher-energy compounds to lower-energy compounds.

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