Capillary constant and surface tension of dimethyl ether and n-butane at temperatures from 214 K to those close to the critical point

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• 作者：Vladimir G. Baidakov ; ^{baidakov@itp.uran.ru" class="auth_mail" title="E-mail the corresponding author} ; Ksenia A. Grishina ; Aleksey M. Kaverin
• 关键词：Capillary constant ; Surface tension ; Dimethyl ether ; Normal butane ; Critical point
• 刊名：Fluid Phase Equilibria
• 出版年：2016
• 出版时间：25 April 2016
• 年：2016
• 卷：414
• 期：Complete
• 页码：55-59
• 全文大小：352 K

文摘

The capillary constant a² has been measured by the differential capillary-rise technique and the surface tension σ of dimethyl ether and n-butane has been determined with the use of data on the densities of saturated liquid and gas. The experiments with dimethyl ether were performed at temperatures from 214 K to 390 K, for n-butane – from 278.15 K to 423.04 K. Equations that approximate the temperature dependences of a² and σ have been suggested.