Lecture 005 - Energy & Thermodynamics

Lecture 005 - Energy & Thermodynamics - 2 O (g)...

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1 Bio1222 Lecture 6: Energy and thermodynamics Bio1222 Closed, open and isolated systems
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2 Bio1222 First law of thermodynamics Bio1222 Second law of thermodynamics Temperature Solid Liquid Gas Entropy
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3 Bio1222 Spontaneous reactions. .. Reactions tend to be spontaneous when. .. Can the reaction occur spontaneously? 1. Products have lower potential energy than the reactants. 2. Products are less ordered than the reactants Bio1222 G = H -T H -T S S G = G G = G final state final state - G - G starting state High G Low G Gibbs free energy Free energy
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4 Bio1222 Contributions of enthalpy and entropy 1. Fermentation of glucose to ethanol C 6 H 12 O 6 (s) 2 C 5 H 5 OH (l) + CO 2 (g) 3. Melting of ice H 2 O (l) H
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Unformatted text preview: 2 O (g) Bio1222 Less Free Energy, More satble less work capacity Free energy, stability, work capacity 5 Bio1222 Exergonic and Endergonic reactions G = -3.5 G = +1.4 G = -5.4 G = -4.1 G = +6.5 G = +2.3 Bio1222 Chemical equilibrium 0.02M 0.001M 0.019M Glucose 1-phosphate Glucose 6-phosphate 6 Bio1222 Equilibrium and open systems Bio1222 Does life go against the 2nd law? 7 Bio1222 Adenosine triphosphate (ATP) Bio1222 ATP and Energy Coupling Glutamic ammonia glutamine acid G = +3.4 kcal/mol G = -7.3 kcal/mol Net G = - 3.9 kcal/mol 8 Bio1222 ATP / ADP cycle Energy Energy ATP/ADP cycle...
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Lecture 005 - Energy & Thermodynamics - 2 O (g)...

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