bioex_lect18

bioex_lect18 - MIT OpenCourseWare http:/ocw.mit.edu 5.111...

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MIT OpenCourseWare http://ocw.mit.edu 5.111 Principles of Chemical Science Fall 2008 For information about citing these materials or our Terms of Use, visit: http://ocw.mit.edu/terms .
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Thermochemistry: Biology-Related Examples See Lectures 16-18 for thermodynamics. See Lecture 18 notes for ATP coupled reactions and enthalpies of hydrogen bonds. Recall from Lecture 17 that the H° of ATP hydrolysis is -24 kJ/mol of ATP . + 2H 2 O ( l ) +HPO 4 –2 (aq) + H 3 O + (aq) N CH N C C C N HC N NH2 HC CH CH O HC CH2 O OH OH P O O O P O O O P O O O N CH N C C C N HC N NH2 HC CH CH O HC CH2 O OH OH P O O O P O O O ATP (aq) ADP (aq) H° = -24 kJ/mol ATP Example 1) from page 3 of Lecture 18 notes: ATP-coupled reactions in the body Many biological reactions are non-spontaneous, meaning they require energy to proceed in the forward direction. The hydrolysis of ATP (ATP ADP), a spontaneous process, can be coupled to a non- spontaneous reaction to drive the non-spontaneous reaction forward.
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This note was uploaded on 03/02/2012 for the course CHEM 5111 taught by Professor Vogel during the Fall '08 term at MIT.

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bioex_lect18 - MIT OpenCourseWare http:/ocw.mit.edu 5.111...

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