Abstract
IN the dynamic method of determining relative vapour pressures, air, initially dry, is passed first over the solution and then over the pure solvent. When it leaves the solution it has taken up a quantity of solvent vapour l1; on leaving the solvent it contains a further quantity, l0–l1.While working on aqueous solutions at o° C., Mr. Hartley and I had realised that the air when over the solution expands by an amount represented by the vapour pressure of the solution, similarly a further expansion takes places over the solvent, but as this further expansion is only that due to the difference of vapour pressures of the two liquids—say 1/10th of 4 mm. Hg—we had assumed that this small quantity was negligible in comparison with the total pressure.
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BERKELEY A Neglected Correction in Osmotics. Nature 95, 34 (1915). https://doi.org/10.1038/095034a0
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DOI: https://doi.org/10.1038/095034a0
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