设起始物浓度=Ao,瞬间浓度=A. 二级反应的速率方程式:
kt=1/A - 1/Ao
当t=t(1/2), A=(1/2)Ao
kt(1/2)=2/Ao - 1/Ao = 1/Ao
当t=t(3/4), A=(3/4)Ao
kt(3/4)=4/3Ao - 1/Ao = 1/3Ao
当t=t(1/3), A=(1/3)Ao
kt(1/3)=3/Ao - 1/Ao = 2/Ao
当t=t(2/3), A=(2/3)Ao
kt(2/3)=3/2Ao - 1/Ao = 1/2Ao
所以,t(1/2):t(3/4)= 3
t(1/3):t(2/3)= 4
不等!