reactionmechanismandreactionorder：級反應(yīng)機(jī)理和反應(yīng)-展示頁
2025-01-21 08:32本頁面
【正文】 cting molecules = molecularity – unimolecular: isomerization, deposition – bimolecular: energy transfer, bination – termolecular: energy transfer + bination ? Reaction order vs. molecularity – Reaction takes place in an elementary reaction ? unimolecular: first order ? bimolecular: second order ? termolecular: third order – Is a first order reaction is always an unimolecular reaction? Consecutive reaction processes ? RX + H2O = ROH + H+ + X – Unaffected by the PH of solution, SN1 reaction – RX ? R+ + X – R+ + H2O ? ROH + H+ ? RX + OH = ROH + X – Alkaline solution – RX ? R+ + X – R+ + OH ? ROH ? What happen for 2nd order reaction? Consecutive reaction processes ? A ? B k1, B ? C k2 – d[A]/dt = k1 [A]。 d(ax)/dt = k1 (ax) – d[B]/dt = k1(ax) k2[B] = k1 a ek1t k2[B] – d[B]/dt + k2[B] = k1 a ek1t ? ? 0..0][,][21121 21 ???????? tBkkeekkakB tktkPlot of concentrations of A, B, C in consecutive process Consecutive reaction010 20 40 60time1/a[A][B][C]Maximum [B] ?????????
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