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General Chemistry A: Thermodynamics Lecture Notes #3 $7.99   Add to cart

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General Chemistry A: Thermodynamics Lecture Notes #3

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Lecture notes of 5 pages for the course General Chemistry A185 at Orange Coast College (Professor Maughan)

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  • April 5, 2023
  • 5
  • 2022/2023
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  • Professor maughan
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jamfestcrzy
Gibbs free energy change of a reaction under
nonstandard conditions
Review standard state
- defined as:
1. For a gas, standard state is 1 atm
2. For substance w aqueous solution, standard state is
1 m
3. For element or compound, standard state is most
stable form at 1 atm and temp around 25c

Nonstandard state and reaction mixture
O

- sign of standard free energy change ( g rxn) tells
direction of spontaneous rxn when both reactants and
products are present at standard state conditions

,Gibbs free energy change ( Sg) for nonstandard condition
- to get free energy at conditions other than standard
states, we can use following: natural log
nonstandard
d

G
8.31pSThtem
state
=
Go+RFInQxReaction grottent
↑standard state

Echange forRxn w/all Reactants products at


Temp T



Free energy changes as a reaction proceeds
- we know that as rxn proceeds, composition of reacting
mixture changes. Bc of this, GFE of system changes
continuously




*
lowest GfE is ategullibRNM

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