General and physical chemistry

1896 Journal of the Chemical Society Abstracts  
of expansion, specific heat, and temperature change for adiabatic compression, to the case of liquids where the external work is negligeable, the equation dQT'/dp = T/C,. dpv/dT is obtained, which, by integration and the expression of Cp in calories, yields A,T = t T / E c p . dv/dT. dp. Necessary data for dv/dT and Cp as functions of p are obtained from Amagat's numbers, and the values of A,T are calculated for pressures from 200 to 2,000 atmospheres at Oo, formulae for other temperatures
more » ... r temperatures being also given, the resnlts agreeing fairly well with existing data. By the substitution of p + A K f o r p , the equation is applicable to solutions, A K being the internal pressure of the solution. By measurements of the resistance and use of the known ternperatme coefficients, the temperature changes for the release of compression are determined for solutions of potassium chloride, sodium chloride, zinc sulphate, sulphuric acid, and sodium chloride in dilute ethylic alcohol. The results are compared with those theoretically calculated, aud show throughout a very satisfactory agreement, although, in the authors' opinion, the differences are greater than the experimental errors (see also this vol., ii, 289; Abstr., 1895, ii,
doi:10.1039/ca8967005509 fatcat:qicqlbmnffhlvdacnu2lwuux6q