Direct methanol fuel cells (DMFCs) have shown some promise as a viable option for providing "green" energy to small electrical devices. Calculate Eº for the reaction that takes place in DMFCs: CH3OH(1) + 3/2 O2(g) → CO2(g) + 2 H₂O(1) Use the following values. AG H₂O(1) = -237 kJ/mol AG°O₂(g) = 0 kJ/mol AG CO₂(g) = -394 kJ/mol ∆G°CH3ОН(1) V EO = = -166 kJ/mol.
Direct methanol fuel cells (DMFCs) have shown some promise as a viable option for providing "green" energy to small electrical devices. Calculate Eº for the reaction that takes place in DMFCs: CH3OH(1) + 3/2 O2(g) → CO2(g) + 2 H₂O(1) Use the following values. AG H₂O(1) = -237 kJ/mol AG°O₂(g) = 0 kJ/mol AG CO₂(g) = -394 kJ/mol ∆G°CH3ОН(1) V EO = = -166 kJ/mol.
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Transcribed Image Text:Direct methanol fuel cells (DMFCs) have shown some promise as a viable option for providing "green" energy to small electrical devices.
Calculate Eº for the reaction that takes place in DMFCs:
CH3OH(1) + 3/2 O2(g) → CO2(g) + 2 H₂O(l)
Use the following values.
AG H₂O(1)
=
-237 kJ/mol
AG°O₂(g) = 0 kJ/mol
AG CO₂(g)
-394 kJ/mol
AG CH3OH(1) = -166 kJ/mol.
i
EO
=
=
Transcribed Image Text:Using data from the table below, place the following in order of increasing strength as oxidizing agents (all under standard conditions).
Half-reaction
E° (V)
4+
2+
+2e → Sn²
0.15
Sn
Sn²+
+ 2e → Sn
-0.14
2-
Cr₂O7²- + 14H+ + 6e¯ → 2Cr³+ + 7H₂O
1.33
MnO4 + 4H+ + 3e¯ → MnO₂ + 2H₂O
1.68
Cl₂ +2e → 2C1-
1.36
Zn²
n²+ + 2e → Zn
-0.76
Increasing of strength as oxidizing agents
<
<
<
Drag and drop your selection from the following list to complete the answer:
Cl₂
2-
2+
Cr₂O7²-
Sn²
4+
Sn
Zn²+
MnO4
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