Chapter 14, Problem 130E

Substance A is a nonpolar liquid and has only dispersion forces among its constituent particles. Substance B is also a nonpolar liquid and has about the same magnitude of dispersion forces among its constituent particles as substance A. When substance A and B are combined, they spontaneously mix.

a. Why do the two substance mix?
b. Predict the sign and magnitude of $\Delta H_{so\ln }$ .
c. Determine the signs and relative magnitudes of $\Delta H_{so\mathrm{l}ute}$ , $\Delta H_{so\mathrm{l}vent}$ , and $\Delta H_{mix}$ .