Ethane is oxidized to carbon dioxide in the presence of nitrate (NO3'). The redox potential for the redox pair CO2/C2H6 is -0.48 volts. The redox potential of the redox pair NO3:/NO2'is 0.42 volts. What is AG for the reaction?
Ethane is oxidized to carbon dioxide in the presence of nitrate (NO3'). The redox potential for the redox pair CO2/C2H6 is -0.48 volts. The redox potential of the redox pair NO3:/NO2'is 0.42 volts. What is AG for the reaction?
Biochemistry
9th Edition
ISBN:9781319114671
Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Chapter1: Biochemistry: An Evolving Science
Section: Chapter Questions
Problem 1P
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![### Problem 4: Redox Reaction of Ethane with Nitrate
**Chemical Reaction Overview:**
- Ethane (\( C_2H_6 \)) is oxidized to carbon dioxide (\( CO_2 \)) in the presence of nitrate (\( NO_3^- \)).
**Redox Potentials:**
- The redox potential for the redox pair \( CO_2/C_2H_6 \) is \(-0.48\) volts.
- The redox potential for the redox pair \( NO_3^-/NO_2^- \) is \(0.42\) volts.
**Question:**
- What is \(\Delta G\) (Gibbs free energy change) for the reaction?
This information is crucial for understanding the thermodynamics of the redox reaction involving ethane and nitrate. To find \(\Delta G\), use the formula relating Gibbs free energy to the redox potentials:
\[
\Delta G = -nFE_{\text{cell}}
\]
where:
- \( n \) is the number of moles of electrons transferred,
- \( F \) is Faraday’s constant (\( 96500 \, \text{C/mol} \)),
- \( E_{\text{cell}} \) is the cell potential (difference between cathode and anode potentials).](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Ffd561d01-0ae3-457f-a40c-080c8db291a7%2Ffc53cc7a-843a-454e-aa03-b96d7e142755%2F6pu3grq_processed.png&w=3840&q=75)
Transcribed Image Text:### Problem 4: Redox Reaction of Ethane with Nitrate
**Chemical Reaction Overview:**
- Ethane (\( C_2H_6 \)) is oxidized to carbon dioxide (\( CO_2 \)) in the presence of nitrate (\( NO_3^- \)).
**Redox Potentials:**
- The redox potential for the redox pair \( CO_2/C_2H_6 \) is \(-0.48\) volts.
- The redox potential for the redox pair \( NO_3^-/NO_2^- \) is \(0.42\) volts.
**Question:**
- What is \(\Delta G\) (Gibbs free energy change) for the reaction?
This information is crucial for understanding the thermodynamics of the redox reaction involving ethane and nitrate. To find \(\Delta G\), use the formula relating Gibbs free energy to the redox potentials:
\[
\Delta G = -nFE_{\text{cell}}
\]
where:
- \( n \) is the number of moles of electrons transferred,
- \( F \) is Faraday’s constant (\( 96500 \, \text{C/mol} \)),
- \( E_{\text{cell}} \) is the cell potential (difference between cathode and anode potentials).
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