Thermodynamics of chloroform and n-Propanol mixtures

Excess viscosities of binary mixtures of chloroform and alcohols

“…In the region of large mole fraction of chloroform, the endothermic heat of mixing has been explained as being due to the breaking of the hydrogen bonds between the few alcohol molecules as they disperse throughout the chloroform (3,4). This endothermic effect outweighs the exothermic formation of the alcohol-chloroform interactions.…”

“…In the low mote fraction of chloroform region, the exothermic heat of mixing values are due to formation of ROH-CHCI3 interactions. This can occur without disrupting the alcohol hy- drogen bonds since only relatively few CKCI3 molecules are present (3,4). The net Increase In interaction that results should cause if to be positive.…”

“…The heat of mixing of most binary pairs of liquids either is exothermic throughout the entire range of mole fractions or is endothermic for all mole fractions. Mixtures of chloroform and alcohols are unusual, in that ^is negative when the mole fraction of chloroform is small and positive when the mole fraction of chloroform is large (1)(2)(3)(4).…”