两平衡处于等温、等压下,但不一定等效
2 X(g) + Y(g) 2Z(g)
起始/mol n(X) n(Y) 0
变化/mol 2b b 2b
平衡/mol n(X)－2b n(Y)－b 2b
2b/[ n(X)－2b+ n(Y)－b +2b ]=0.4
n(X)－2b >0 n(Y)－b >0
当 n(Y) =b时,n(X) / n(Y) =5
当 n(X)=2b时,n(X) / n(Y) =0.5
0.5 < n(X) / n(Y) < 5