Thermodynamics Study of the Interaction of CsCl with <scp>d</scp>-Glucose in Water from <i>T</i> = 278.15 to 313.15 K

Abstract

Electromotive forces of cells without liquid junctions K-ISE | CsCl(mE) | ISE-Cl and K-ISE | CsCl(mE), glucose(mS) | ISE-Cl have been measured at 5 K intervals from T = 278.15 to 313.15 K, where mE = (0.001 to 0.1) mol kg-1 and mS = (0.01 to 3.0) mol kg-1. The activity coefficients of CsCl in glucose + water solutions can be obtained from these electromotive force data; in the meantime, the interaction parameters of the CsCl + glucose pair in water, gEN, hEN, sEN, and cp,EN, can be evaluated. We show that gEN > 0, hEN > 0, sEN > 0, and cp,EN < 0 at all four temperatures (except for hEN and sEN at T = 313.15 K), and the values of gEN, sEN, and cp,EN vary slightly with temperature, whereas the values of hEN is very sensitive to the temperatures used. These thermodynamic parameters were discussed in terms of a model of the structural interaction and electrostatic interaction and were analyzed by the group additivity principle.