物理化学实验报告No2蒸气压.doc
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纯水饱和蒸气压的测定
马瑞
摘 要： 本实验采用动态法——通过测定不同外压下纯水的沸点，来确定不同温度下的饱
和蒸气压。实验数据表明水的饱和蒸气压随温度的下降而减小，lnp 对 1/T 呈良
好的线性关系。这与克拉贝龙-克劳修斯方程相符，并由此方程可求得水的摩尔
汽化热。
关键词：水 沸腾 饱和蒸气压 摩尔汽化热
The Determination of Saturated Vapor
Pressure of Pure Water
Ma Rui (Marine.Marion)
( NCL USTC Hefei Anhui P.R.China， 230026 )
Email：marion@USTC.edu
Abstract ： This experiment by ‘Dynamic Method’ is to determine the boiling point of
pure water under different pressures, so we can get the saturated vapor
pressures at different temperature. It is found that the saturated vapor
pressure of pure water decreases with the decreasing of temperature and the
relation of lnp ~ 1/T is well linear. It accords with Clapeyron-Clausuis
Equation, and then we can obtain the molar heat of vaporization of pure
water.
30 - 1 物理化学实验 No.2 PB02206003 马瑞
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