reactionmechanismandreactionorder：級(jí)反應(yīng)機(jī)理和反應(yīng)(參考版)
2025-01-15 08:32本頁(yè)面
【正文】 [BX*]t=0 = b。[H+]/(Ka + [H+]) – We can formulate rate equation by [A] amp。 – [A] + [B] = [A]{([H+] + Ka)/[H+]} – = [B]{(Ka + [H+])/Ka} = a – [B] = a 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]2/[I2] [I]=K11/2[I2]1/2 ? d[HI]/dt = 2k2[H2][I]2 = 2k2K1[H2][I2] – Ea(k2) = 21 kJ/mole – Ea(k2) + Bond dissociation energy of I2 == Overall activation energy of Bodenstein thermal experiment. A probable mechanism for H2 + I2 ? I2 = I + I … (1) ? I + H2 = IH2 … (2) ? I + IH2 ? HI + HI … (3) ? K1 = [I]2/[I2] [I]=K11/2[I2]1/2 ? K2 = [IH2]/[I][H2] [IH2]=K2 [I][H2] ? d[HI]/dt = 2k3[IH2][I] = 2k3K1K2[H2][I2] Hydrogenhalogen kiics ? H2F2, H2Br2, H2Cl2 – plicated experimental rate law – interpreted in terms of free radical chain reaction ? H2I2 – simple kiic behavior – the least understood system Reactant participating in equilibria ? nA=An – [A]=Kn1/n [An]1/n = Kn1/n [c/n]1/n – [A]: a part of agg
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