Rapid determination of vapour‐liquid equilibria

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<jats:title>Abstract</jats:title><jats:p>An apparatus for the determination of vapour‐liquid equilibria at constant pressures within the range of 760 to 10 mm Hg is described.</jats:p><jats:p>The apparatus can produce eight pairs of samples of coexisting vapour and liquid, evenly distributed over the concentration range in one run within two hours.</jats:p><jats:p>As a proof of its operation the results obtained with six binary systems are recorded. The systems investigated are:</jats:p><jats:p>Carbon tetrachloride‐benzene.</jats:p><jats:p>Carbon tetrachloride‐toluene.</jats:p><jats:p>Benzene‐dichloroethane.</jats:p><jats:p><jats:italic>n</jats:italic>‐heptane‐methylcyclohexane.</jats:p><jats:p>methylcyclohexane‐toluene.</jats:p><jats:p><jats:italic>n</jats:italic>‐decane‐<jats:italic>trans</jats:italic>‐decahydronapththalene.</jats:p><jats:p>The results obtained agree with a thermodynamic criterion which is discussed separately.</jats:p>

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