The dielectric constant of the binary liquid system n. heptane + methanol near its critical temperature

Abstract

The electrical capacitance of the binary liquid mixture n. heptane + methanol at its critical composition is studied in both one-phase and two-phase regions. The two-phase capacitance data are used with the known functional forms for the order parameter and the diameter to obtain T_c and c_c with greater precision. This helps in reducing the number of unknown parameters in the functional form for the one-phase capacitance. The data show consistency with an alpha (α ) exponent for dc/dt in the one phase region.