Table 3.

Medium effects and free energy changes in the transfer of tris(hydroxymethyl)aminomethane from water to water-methanol solvents

Wt percent methanol	15 °C		25 °C		35 °C
	log mγB	${\Delta }_{\text{m}}{G}_{\text{B}}^{°}$	log mγB	${\Delta }_{\text{m}}{G}_{\text{B}}^{°}$	log mγB	${\Delta }_{\text{m}}{G}_{\text{B}}^{°}$
10	0.0667	0.368	0.0550	0.314	0.0445	0.263
20	.135	.745	.114	.651	.0955	.563
30	.208	1.15	.180	1.03	.154	.909
40	.285	1.57	.254	1.45	.221	1.30
50	.379	2.09	.343	1.96	.303	1.79
60	.499	2.75	.459	2.62	.412	2.43
70	.653	3.60	.604	3.45	.549	3.24
80	.834	4.60	.791	4.52	.729	4.30
90	1.094	6.04	1.032	5.89	.935	5.52
100	1.322	7.29	1.297	7.40	1.231	7.26

Values of ${\Delta }_{\text{m}}{G}_{\text{B}}^{°}$ are expressed in kJ mol⁻¹.