Lec. 34 Chemical Thermodynamics

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Fred J. Grieman
Lec. 34 Chemical Thermodynamics
Redox Reactions Electrochemical Cells HW
126a,8a,15,19,21,23 133,5ac
http//www.elfyourself.com/?id1199330323
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mix
0.1 M Cu2
0.01 M Cu2
Harness energy involved. Right now heat given to
surroundings
.01
.1
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Just need species that will gain or lose
electrons
Redox Reactions !!!!









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?S qrev / T






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electrical equivalent gravitational field
? electrical field (resistance) also
potential E (?V/Q) ?E electrical potential
(volts)
work wext welec -Q ?E I Q/t ? welec
-I t ?E units J C V A t V ?G
wext welec -Q ?E for rxn Q of
electrons n F ?G -n F ?E
Reversible !!!

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?EBattery ?Ecell ?G
(wext)rev reversible
-n F ?E dE either way reverses flow