Calculating enthalpy change in an oxidation ratio
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What is deltaE for the oxidation of ubiquinol by cytochrome c when the ratio of [QH2]/[Q] is 10 and the ratio of [cyt c3+]/[cyt c2+] is 5?
cytochrome c (Fe3+) + e- <---------> cytochrome c (Fe2+) E'o = 0.254V
Ubiquinone + 2H+ + 2e- <-----------> ubiquinol + H2 E'o = 0.045V
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Solution Summary
This solution is provided in 356 words in an attached .doc file. It discusses Nernst equations and how this relates to the problem, as well as explains step-by-step how to find the change in enthalpy.
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What is ΔE for the oxidation of ubiquinol by cytochrome c when the ratio of [QH2]/[Q] is 10 and the ratio of [cyt c3+]/[cyt c2+] is 5?
cytochrome c (Fe3+) + e- <---------> cytochrome c (Fe2+) E'˚ = 0.254V
Ubiquinone + 2H+ + 2e- <-----------> ubiquinol + H2 E'˚ = 0.045V
The electrode potential, because of its measure of the chemical driving of the half reaction, is affected by concentration. Thus the tendency of the cytochrome c to oxidize ubiquinol is driven by the concentrations of the ...
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