作者BIEGABOY (BIEGABOY)
看板TransBioChem
标题Re: [问题] 问一题化学急!!!
时间Tue Jul 20 20:12:54 2010
※ 引述《a65465435032 (小P)》之铭言：
: In light of the following thermochemical equation
: 2H2+O2--->2H2O ( 三角形) H=-571.6KJ
: What volume of H2 ,measured at27度c 745torr,must be burned in excess
: oxygen to release 1000kJ of heat to the surrouding?
: A)22L B)5.21*10^-3L C)87.9L D)44L E)109L
: 大家帮我解答吧 谢谢
H2+1/2 O2--->H2O deltaH=-571.6 *0.5 KJ
let H2 n mole, n=1000/(571.6*0.5)
PV=nRT (745/760)V=n*0.082*300
V=88.0L
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※ 发信站: 批踢踢实业坊(ptt.cc)
◆ From: 114.39.1.58
1F：推 a65465435032:谢谢我看董了= =只是我没想到deltaH可以这样比 07/20 20:41