作者pcchiou (kk)
看板TransBioChem
標題Re: [化學] 問一題考古題
時間Mon Jun 18 02:18:19 2012
※ 引述《clvf (Ocean)》之銘言：
: the urban air pollution is often due to the release of NOx that is
: mainly consisted of NO and NO2. NOx may be catalytically converted
: into nitrogen and water with use of ammonia.
: in order to have complete conversion of 6.0L NOx in which the molar
: ratio of NO and NO2 is 1:2 under the same temperature and atomospheric
: pressure, how many liter of ammonia will be needed at least?
: (a)3.0 (b)6.0 (c)12.0 (d)20.0
: 出處http://tinyurl.com/7gkbd47
: 算了很久 算不出答案....
: 煩請版上神人幫忙解答
: 謝謝!!!
PV=nRT
定溫定壓 V正比n 總體積是6L 所以NO:2L NO2:4L
先把方程式寫出來
6NO + 4NH3 → 5N2 + 6H2O
2L
-2L -(2/3)2L
6NO2 + 8NH3 → 7N2 + 12H2O
4L
-4L -(4/3)4L
所需NH3: 4L/3 + 16L/3 = 20L/3 = 6.666..L = 6.67L
所以至少要超過 6.67L 故選 (C) 12L
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1F：推 clvf:可是板上答案一致都是B耶= = 06/18 14:19
2F：推 clvf:不過我的算法跟你一樣 但是題目問至少需多少 這樣根本沒答案 06/18 14:23
3F：→ pcchiou:是噢我的考古題書是寫c噢 06/18 16:32
4F：→ pcchiou:有時相信自己也不錯噢^.< 06/18 16:52