Excess Molar Volume, Viscosity and Heat Capacity for the Mixture of 1,2-Propanediol-Water  at Different Temperatures

Abstract

Abstract: Experimental densities, viscosities and heat capacities at different temperatures were
presented over the entire mole fraction range for the binary mixture of 1,2-propanediol and
water. Density values were used in the determination of excess molar volumes, VE. At the
same time, the excess viscosity was investigated. The values of VE and ηE were fitted to
the Redlich-Kister equation. Good agreement was observed. The excess volumes are negative
over the entire range of composition. They show an U-shaped-concentration dependence and
decrease in absolute values with increase of temperature. Values of ηE are negative over
the entire range of the composition, and has a trend very similar to that of VE . The
analysis shows that at any temperature the specific heat of mixture is a linear function of
the composition as x1＞20%. All the extended lines intersect at one point. An empirical
equation is obtained to calculate the specific heat to mixture at any composition and
temperature in the experimental range.

Key words: viscosity, heat capacity, density, excess molar volume, molecular interaction

摘要： Experimental densities, viscosities and heat capacities at different temperatures were
presented over the entire mole fraction range for the binary mixture of 1,2-propanediol and
water. Density values were used in the determination of excess molar volumes, VE. At the
same time, the excess viscosity was investigated. The values of VE and ηE were fitted to
the Redlich-Kister equation. Good agreement was observed. The excess volumes are negative
over the entire range of composition. They show an U-shaped-concentration dependence and
decrease in absolute values with increase of temperature. Values of ηE are negative over
the entire range of the composition, and has a trend very similar to that of VE . The
analysis shows that at any temperature the specific heat of mixture is a linear function of
the composition as x1＞20%. All the extended lines intersect at one point. An empirical
equation is obtained to calculate the specific heat to mixture at any composition and
temperature in the experimental range.

关键词: viscosity;heat capacity;density;excess molar volume;molecular interaction

YANG Changsheng, MA Peisheng, TANG Duoqiang, JIN Fengmin. Excess Molar Volume, Viscosity and Heat Capacity for the Mixture of 1,2-Propanediol-Water
at Different Temperatures[J]. .

杨长生, 马沛生, 唐多强, 靳凤民. 1,2-丙二醇水溶液在不同温度下的超额摩尔体积黏度和热容[J]. CIESC Journal.

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Excess Molar Volume, Viscosity and Heat Capacity for the Mixture of 1,2-Propanediol-Water
at Different Temperatures

1,2-丙二醇水溶液在不同温度下的超额摩尔体积黏度和热容

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