Critical Behavior of Refractive Index of Binary Mixture Cyclohexane - Phenol

The dynamic shear viscosity of binary mixture of cyclohexane - phenol was measured over the temperatures range (14.0 °C – 21.0 °C) and at concentration range (0.00% – 39.70%) by weight of phenol. The results above the critical temperature and critical concentration were analyzed by the mode coupling theory of one phase. The anomaly of the dynamic shear viscosity was detected as a function of temperature and concentration. Dynamic shear viscosity anomaly was clearly observed near the critical temperature Tc = 17.0 ℃ and the critical concentration χc = 2.70% by weight of phenol. The behavior of refractive index of cyclohexane - phenol obeys power law universality above the phase transition. The value of noncritical part of refractive index was found to be n_0D = 1.4276. The universal critical exponent for refractive index χ_n is also calculated to be 0.00156. The critical isobaric specific heat for the critical binary mixture c_pc was found to be 106.6 J/Kg.K using two scale factor universality. Joule`s constant for cyclohexane - phenol binary mixture was found to be 4.15 Calorie/J.