Question

化学K只计算在2L容器 2MOL SO2 1MOL O2 冲入发生 2SO2+O2=2SO3 总物质量2.1MOL 求

Answer 1

设有xmolO2 转化为SO3,则SO2消耗了2x mol,生成SO3 2x mol:

2SO2 + O2 = 2SO3

2.1.2

2x.x.2x

平衡时：(2-2x) + (1-x) + 2x = 2.1

x=0.9mol

n(SO2) = 2-2x=0.2mol; n(O2)=1-x=0.1mol; n(SO3) =2x=1.8mol

[SO2] = 0.2/2 =0.1mol/L; [O2]=0.05mol/L; [SO3] = 0.9mol/L

K= [SO3]^2/([O2]*[SO2]^2) = 0.9*0.9/(0.05*0.1*0.1) = 1620 (L/mol)