On space craft, a H2, O2 fuel cell is used to produce electricity.
- The reactions
- What is the reaction at the anode?
- What is the reaction at the cathode?
- What is the balanced redox reaction?
- What is Ecell assuming Po2 = 2*atm, and PH2 = 2*atm.
- If two cylinders of H2 and 1 cylinder of O2 (cylinder: volume=200 liter, pressure = 3000 psi) are used.
- How many moles of electons can be produced?
- How much energy (joules) is this?
- If this energy has to last for 1 week, what is the average power (watts) available?
- Compare the amount of energy produced by this fuel cell to the energy produced by the combustion of the same amount of H2 and O2 using Hrxn.
- The following relationships may be useful:
- V = kg m2 s-3 A
- A = C s-1
- J = kg m2 s-2
- W = J s-1
- Electrochemical Analysis techniques are capable of detecting very small amounts of certain metals. In one type of analysis Cd2+ undergoes electrolysis. In this experiment it is possible to detect a signal from 1 pA of current, lasting only 1 ms.
- How many moles of Cd2+ does this correspond to?
- How many atoms is this?
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Scott Van Bramer
Department of Chemistry
Chester, PA 19013
© copyright 1996, S.E. Van Bramer
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Last Updated: Saturday, May 18, 1996