The cell reaction in a hydrogen—oxygen fuel cell in space vehicles (Figure 19.19) is 2 H 2 ( g ) + O 2 ( g ) → 2 H 2 O ( l ) (a) Use the standard reduction potential data in Appendix I) to calculate the standard potential for this fuel cell. (b) Calculate the value of Δ G o (in kilojoules) and K at 25 °C. (c) What is the cell voltage at 25 °C if the partial pressure of each gas is 25 atm?
The cell reaction in a hydrogen—oxygen fuel cell in space vehicles (Figure 19.19) is 2 H 2 ( g ) + O 2 ( g ) → 2 H 2 O ( l ) (a) Use the standard reduction potential data in Appendix I) to calculate the standard potential for this fuel cell. (b) Calculate the value of Δ G o (in kilojoules) and K at 25 °C. (c) What is the cell voltage at 25 °C if the partial pressure of each gas is 25 atm?
Solution Summary: The author explains that the standard potential for the fuel cell should be calculated.
The cell reaction in a hydrogen—oxygen fuel cell in space vehicles (Figure 19.19) is
2
H
2
(
g
)
+
O
2
(
g
)
→
2
H
2
O
(
l
)
(a) Use the standard reduction potential data in Appendix I) to calculate the standard potential for this fuel cell. (b) Calculate the value of
Δ
G
o
(in kilojoules) and K at 25 °C. (c) What is the cell voltage at 25 °C if the partial pressure of each gas is 25 atm?
Using the graphs could you help me explain the answers. I assumed that both graphs are proportional to the inverse of time, I think. Could you please help me.
Synthesis of Dibenzalacetone
[References]
Draw structures for the carbonyl electrophile and enolate nucleophile that react to give the enone below.
Question 1
1 pt
Question 2
1 pt
Question 3
1 pt
H
Question 4
1 pt
Question 5
1 pt
Question 6
1 pt
Question 7
1pt
Question 8
1 pt
Progress:
7/8 items
Que Feb 24 at
You do not have to consider stereochemistry.
. Draw the enolate ion in its carbanion form.
• Draw one structure per sketcher. Add additional sketchers using the drop-down menu in the bottom right corner.
⚫ Separate multiple reactants using the + sign from the drop-down menu.
?
4
Shown below is the mechanism presented for the formation of biasplatin in reference 1 from the Background and Experiment document. The amounts used of each reactant are shown. Either draw or describe a better alternative to this mechanism. (Note that the first step represents two steps combined and the proton loss is not even shown; fixing these is not the desired improvement.) (Hints: The first step is correct, the second step is not; and the amount of the anhydride is in large excess to serve a purpose.)
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Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell