Bakhuis-Rooseboom method

Fig. 1.3. Partial molar volume (a) the molar volume v,° of a pure substance i and the partial molar volume v, of substance i in a homogeneous mixture (b) graphical determination of the partial molar volumes of constituent substances in a homogeneous binary system by the Bakhuis-Rooseboom Method v = V/(n, + nt) = the mean molar volume of a binary mixture x2= the molar fraction of substance 2 Vj = v - x2(dv/dx2) = the partial molar volume of substance 1 v2 = v-(l-x2 avldx2) = the partial molar volume of substance 2. [Ref. 1.]...

Thus hf is equal to the heat absorbed (per mole of 1) when a small quantity 8ui of substance 1 is dissolved in the solution at constant T and p. For this reason it is often called the heat of solution of component 1, differential heat of mixing or partial molar heat of mixing." The partial molar heats may be determined readily from the heat of mixing h by the Bakhuis-Rooseboom method described in 3 of chap. I. 

The mixed films, CTAB (1) + egg-lecithin (2), were treated as two-dimensional mixtures of known composition. From the average molecular areas at a given surface pressure, we deduced the partial molecular areas di and a2 at the same pressure (2) using the classical Bakhuis-Rooseboom method. The pressure of the mixed films as a function of the partial molecular areas is shown in Figure 2. Also shown are the isotherms of the pure components 1 and 2 and of the 1/1 mixed real film. 

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See also in sourсe #XX -- [ ]

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