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简答题某药物在90℃,分解10%需要10天,设其活化能为20kcal/mol,求25℃时的储存期与半衰期。(lg3.2851=1928,1g3.6872=4886)
  • 药物在90℃,分解10%需要10天,有 t=0.1054/k k=0.1054/1.0=0.01054 logk/k=e(t-t)/(2.303r×t×t) logk=logk-e(t-t)/2.303×1.987×298×338 logk=log0.01054-20×10(90-25)/2.303×8.319×298×363 logk=-1.977-2.626 logk=-4.603 t=0.1054/k t=0.1054/k=4220天 t=0.693/k=27720天
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