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Topic: Products of fuel cells  (Read 3279 times)

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Offline xtheunknown0

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Products of fuel cells
« on: October 02, 2011, 11:11:14 PM »
Hello,

How do you disprove choice B for question 16 of http://www.vcaa.vic.edu.au/vcaa/vce/studies/chemistry/exams/2009/2009chem2-w.pdf
?

TIA,
xtheunknown0

Offline fledarmus

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Re: Products of fuel cells
« Reply #1 on: October 03, 2011, 07:48:39 AM »
1) What are the gaseous products of the fuel cell reaction? (it might help to write out the chemical reaction that is occurring here)

2) What would happen to your chemical reaction if those products were recycled into the fuel cell?

Offline xtheunknown0

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Re: Products of fuel cells
« Reply #2 on: October 03, 2011, 09:50:41 PM »
1) CO2(g)
2) Would it slow down the rate of the forward reaction?

Offline fledarmus

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Re: Products of fuel cells
« Reply #3 on: October 04, 2011, 08:05:51 AM »

2) Would it slow down the rate of the forward reaction?

You write that as if it were a guess!  ;)  Good one though...

http://en.wikipedia.org/wiki/Le_chatelier%27s_principle

Offline SABRY

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Re: Products of fuel cells
« Reply #4 on: October 13, 2011, 03:53:58 AM »
1. Fuel cells produce CO2?

2. Please review back the chemical reaction involved

Offline fledarmus

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Re: Products of fuel cells
« Reply #5 on: October 13, 2011, 08:03:28 AM »
This is a methanol fuel cell, not a hydrogen fuel cell. The reactions were provided as part of the question:

Quote
A fuel cell can be constructed that uses the following two half-reactions.
CO2(g) + 6H+(aq) + 6e– CH3OH(aq) + H2O(l) Eo = + 0.05 V
O2(g) + 4H+(aq) + 4e– 2H2O(l) Eo = +1.23 V

Offline xtheunknown0

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Re: Products of fuel cells
« Reply #6 on: October 20, 2011, 06:15:26 AM »

2) Would it slow down the rate of the forward reaction?

You write that as if it were a guess!  ;)  Good one though...

Thanks for your input :)

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