作者eric810281 (eric)
看板ChemEng
标题[问题] 跪求解答
时间Sat Jun 15 22:59:43 2013
(一) When hydrogen is oxidized completely to water at 25oC, how much
electrical energy can be produced using a fuel cell? Assume that there are no
electrical losses. What is the electromotive force of the fuel cell ? (5分)
(二) When one mole of hydrogen is oxidized completely in a Carnot engine that
operates between 500 K and 300 K, how much electrical energy can be produced? Assume that the mechanical energy can be converted completely into electrical energy. (5分)
Given: For water at 25 oC, the enthalpy of formation (岛fHo) and the Gibbs
energy of formation(岛fGo) are -285.83 kJ mol-1 and -237.13 kJ mol-1,
respectively. The Faraday constant is
96,485 Coulomb/mole.
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1F：→ lucifer19:自己的想法 疑问处什麽都没讲 就丢题目140.120.134.143 06/16 12:41
2F：→ lucifer19:上来 只能说自己的作业自己写140.120.134.143 06/16 12:42
3F：→ eric810281:这不是作业阿,我都毕业多久了 36.236.113.23 06/16 20:27
4F：→ eric810281:就不知道从何下手才上来问,l大管太多了 36.236.113.23 06/16 20:28
5F：推 lucifer19:既然如此我道歉 对不起140.120.134.143 06/16 20:52
6F：推 jasonfghx:这样好似不易有解答 140.116.33.224 07/03 12:09