推 a65465435032:謝謝我看董了= =只是我沒想到deltaH可以這樣比 07/20 20:41
※ 引述《a65465435032 (小P)》之銘言：
: 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
: 大家幫我解答吧 謝謝
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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