(1)y1(=)xo T (>)t
(2)根据相平衡公式(1)y=ax/(1+(a-1)x)可求出Yn=0.5625.因为是全回流Xn=Yn+1所以
Xn-1=0.5625再根据相平衡公式y=ax/(1+(a-1)x)求出Yn-10.794