Thermo 1_Lhandout

Thermo 1_Lhandout - Thermodynamics 1. The First Law and...

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1 Thermodynamics 1. The First Law and Thermochemistry BIOL 7110 / 4105 CHEM 8901 / 4804 January 18, 2011 The oxidation of glucose C 6 H 12 O 6 + 6O 2 6CO 2 + 6H 2 O This reaction is exothermic = it releases heat An endothermic reaction absorbs heat This reaction is exergonic = it releases energy An endergonic reaction absorbs energy The oxidation of glucose C 6 H 12 O 6 + 6O 2 6CO 2 + 6H 2 O This is called a spontaneous reaction, because it “wants to go”, We also say that the reaction is “ downhill i.e., because the reaction is favorable The oxidation of sucrose This reaction releases energy The oxidation of sucrose Explosion of the Imperial Sugar refinery in Port Wentworth, GA, Feb 7, 2008. (Photo from the Savannah Morning News). C 6 H 12 O 6 + 6O 2 6CO 2 + 6H 2 O photosynthesis h ν ADP + P i ATP The cycle of life
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2 Thermodynamics tells us whether or not a physical process is possible Thermodynamics does not tell us the rate at which a possible process will occur That’s
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Thermo 1_Lhandout - Thermodynamics 1. The First Law and...

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