是多少kPa? j10b10586(答案)
解:反应 A+2B?D
(1)
?dpA1.50.51.50.52?kpApB?kpA?2pA??k?pAdt [1分]
1?11?1?11??3?1?1k??????????1.8?10kPa?sect?pApA0?20?25250? [2分]
1? pA?k?t??11?1.8?10?3?40?pA0250 [2分]
? ?pA?13.16kPa
k2?Ea?11?ln????R?T1T2?k1? (2) [1分]
ln
k2?40000?11?????1.8?10?38.314?300400? [1分]
??9.92?10?2kPa?1?s?1k2 [1分]
11??9.92?10?2?20'' pA250 [1分]
''''''p?p?p?249.5kPa[1分] p?0.503kPaDA0AA 则