【正确答案】纯物： (?m/?p )T = Vm =dp 左边： m-m*= RTlnf/f* 右边： dp=RT/p(1-βp)]dp = RT1/p+β/(1-βp)]dp = RTln(p/p* )- RTln[(1-βp)/(1-βp*)] (积分下限pi= p*) RTln(f/f*)= RTlnp/p*- RTln[(1-βp) / (1-βp* )] 当 p*→0 时 f*→ p*，f*/p*= 1，1-βp*= 1 lnf = lnp - ln(1-p) = ln[p/(1-βp)] f = p/(1-p)