Abstract

The scarcity of accurate bulk modulus data on many liquids led to the construction of an apparatus to determine both adiabatic and isothermal bulk modulus values. The apparatus is designed for highly compressible liquids such as pentane as well as relatively ``hard'' liquids like water or crude oils. The temperature range of the instrument is from 0 to +50°C, and the pressure range from 0 to 300 kg/cm2. The precision in adiabatic bulk modulus measurements with this apparatus has been determined for water for which the derived error is 0.1%.

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