摘要
本文把化学平衡的原理应用于相平衡,利用对氯仿的亨利常数及温度对亨利常数的影响的测定可以算出平衡常数Kθ,用Kθ算出ΔagqGθm,用ΔagqGθm算出ΔfGθm(CHCl3,aq,298K),用[(ΔTagqGθm]p=-ΔagqSθm算出ΔagqSθm(298K),最后算出Smθ(CHCl3,aq,298K)、ΔfHθm(CHCl3,aq,298K)。亨利常数是利用顶空色谱法测定的,是利用顶空色谱峰面积的倒数与气液比之间的线性关系测定了不同温度下氯仿的亨利常数值。
In this article, chemical equilibrium is applied to phase equilihrlum. Using betermination of henry's law and effect of temperature on henry's law constant for chloroform, We can compute equilibrium constant K^θ ,and △αq^gGm^θ by using K^θ, and △fGm^θ(CHCl3,αg,298K) by using △αq^gGm^θ, and △αq^gSm^θ (298K) by using [a(△αq^gGm^θ/aT]p=-△αq^gSm^θ and finally, compute Sm^θ(CHCl3,αq,298K),△fHm^θ(CHCl3,αq,298K). Static headspace method was used to determine henry's law constant (K) of chloroform. In the Static headspace Method, K of chloroform was determined from plot of the linear relationship between reciprocal of gas Chromatographic peak area of chloroform ( 1/ PA ) and gas to water phase ratio (Vg/Vw).
关键词
热力学性质
亨利常数
氯仿
顶空气相色谱
thermodynamic properties
henry's law constant
chloroform static headspaee method
作者简介
夏太国(1949-),男,吉林长春人,辽宁工程技术大学基础部副教授,从事非电解质溶液理论研宄。