Calculate delta G and E cell under standard conditions?
20.50) Calculate corresponding delta G and E cell under standard conditions?
If the equilibrium constant for a one-electron redox reaction at 298 K is 4.1×10^6, calculate the corresponding delta G and E0 cell under standard conditions.
Can someone help me find these two values? Delta G should be in kJ and E0 cell should be in V.
standard contions means 25 Celsius, or 298 Kelvin
dG = -RTlnK
dG = – (8.314Joules/mol-K)(298K)(ln 4.1e6)
dG = – (8.314Joules/mol-K)(298K)(15.2265)
dG = – 37724.7 joules, -37.725 kJ
your answer: dG = – 38 kJ
(sorry but it only gets 2 sigfigs , when your K only has 2 sig figs)
========================
for a one electron redox:
dG = -nFE
- 37.7 kJ = – (1 mol e-) (96.5 kJ/volt-mol)(Eo)
Eo = 0.39 volts
your answer is : 0.39 volts
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