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Compressibility of Liquids Formulae and Calculator

Compressibility of Liquids Equations and Calculators

If v₁ and v₂ are the volumes of the liquids at pressures of p₁ and p₂ atm, respectively, at any temperature, the coefficient of compressibility b is given by the equation

${\displaystyle b=\frac{1}{v_1}\frac{v_1-<!--\; -\; -->v_2}{p_2-<!--\; -\; -->p_1}}$

The value of b x 10⁶ for oils at low pressures at about 70°F varies from about 55 to 80; for mercury at 32°F, it is 3.9; for chloroform at 32°F, it is 100 and increases with the temperature to 200 at 140°F; for ethyl alcohol, it increases from about 100 at 32°F and low pressures to 125 at 104°F; for glycerin, it is about 24 at room temperature and low pressure.

Sources:

Marks Standard Handbook for Mechanical Engineers

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