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Newthis it the new course of the electro chemistry pptx. please check out.
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We consider the following situation.Initial state: no ion/solvent interactions.This corresponds to ion in vacuum
This corresponds to ion in vacuum
Final State: ion/solvent interactions operative.This corresponds to ion in solution.Thermodynamics states that for reversibleProcess taking place at const T & P
S
Process taking place at const. T & P,Free Energy change
G equals net work
(other than PV work) done on system.We need to calculate the work done inTransferring an ion from vacuum into a solvent
Charged
Transferring an ion from vacuum into a solvent. A solvent such as water has a complex structure.To simplify our analysis we dispense with structure
Chargedsphere
nucleus
Electroncloud
i^
i
q
z e
i r
i
Net charge
and regard the solvent as a structurless dielectriccontinuum. This medium has a dielectric constantgiven by
S
The ion also has structure (ion +
associated hydration sheath). We represent the ion
h
d
h
f
h
d
d
nucleus
as a charged sphere of net charge q
i
= z
e and radiusi
r
i
l
Dielectric constant
S
Gibbs energy of solvation computed via
Structured solvent
StructurlessDielectriccontinuum
a thermodynamic cycle.