reactionmechanismandreactionorder：級反應(yīng)機(jī)理和反應(yīng)(編輯修改稿)
2025-02-08 08:32 本頁面
【文章內(nèi)容簡介】 ision – effective molecule=highly negative activation energy ? higher temperature: lower reaction rate – efficiency is different depend on molecule ? large molecule Porter’s interpretation(1961) ? I + M = (K1)。 + I ? I2 + M(k2) – : spectroscopically identified for benzene – []=K1[I][M] – d[I2]/dt = k2[I][] = K1k2[I]2[M] ? RT ln K = ?G = ?(HTS) ? k = A exp[Ea/RT] ? ? ? ? ? ?212121)/1(ln)/1(ln)/1(lnEHTdkdRTdKdRTdkKdREa?????????Parallel reaction ? A?B (1) A?C (2) – d[A]/dt = (k1 + k2)[A] – (ax)=a exp[(k1+k2)t] – k1/k2 = Yield of B/Yield of C ? A?C (1), A+B?D (2) – d[A]/dt = (k1 + k2[B])[A] ? A?B (1), A+A?C (2) A B C Reactant participating in equilibria ? H2 + I2 = 2HI – Bodenstein 1899 – first order with respect to each reactants – Bimolecular process, elementary reaction, four center transition state – Sullivan 1967: 0200?C 。 non elementary reaction – I2 + h? ? I2*, I2* ? 2 I 2 I + H2 ? 2 HI A probable mechanism for H2 + I2 ? I2 = I + I … (1) ? I + I+ H2 ? HI + HI … (2) ? K1 = [I
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