Table 4.

Enthalpy and entropy changes in the transfer of tris(hydroxymethyl)aminomethane from water to water-methanol solvents at 25 °C

Wt percent methanol	${\Delta }_{\text{m}}{H}_{\text{B}}^{°}$	${\Delta }_{\text{m}}{S}_{\text{B}}^{°}$
10	1.9	5
20	3.4	9
30	4.6	12
40	5.5	14
50	6.5	15
60	7.4	16
70	8.8	18
80	9.0	15
90	13.6	26
100	7.9	2

${\Delta }_{\text{m}}{H}_{\text{B}}^{°}$ is given in kJ mol⁻¹ and ${\Delta }_{\text{m}}{S}_{\text{B}}^{°}$ in J deg⁻¹ mol⁻¹.