Table 2.

Activity coefficient values and excess thermodynamic functions calculated for the binary physical mixture nimesulide–salicylic acid.

xNIM	xSA	T (K)	ln γNIM	ln γSA	GE (J/mol)	SE (J/mol٠K)	${\mathsf{\mu }}_{\mathbf{N}\mathbf{I}\mathbf{M}}^{\mathbf{E}}$(J/mol٠K)
0	1	429.7	-	0	0	0	-
0.1	0.9	417.63	0.4064	−0.0721	−84.33	0.20	1410.94
0.2	0.8	411.96	0.2604	−0.0413	65.17	−0.16	892.01
0.3	0.7	409.13	−0.0085	0.0479	105.37	−0.26	−28.91
0.4	0.6	406.05	−0.2053	0.1531	32.93	−0.08	−693.04
0.5	0.5	395.27	0.1508	−0.5577	−668.46	1.69	495.73
0.6	0.4	406.13	0.2179	−0.5862	−350.18	0.86	735.89
0.7	0.3	409.67	0.1422	−0.525	−197.32	0.48	484.45
0.8	0.2	413.48	0.0916	−0.3293	25.61	−0.06	314.98
0.9	0.1	417.21	0.0536	0.0461	183.19	−0.44	185.79
1	0	419.67	0	-	0	0	0

x_NIM—molar fraction of nimesulide, x_SA—molar fraction of salicylic acid, T—liquidus temperature, γ_NIM—activity coefficient of nimesulide, γ_SA—activity coefficient of salicylic acid, G^E—excess Gibbs free energy, S^E—excess entropy, ${\mathsf{\mu }}_{\mathrm{NIM}}^{\mathrm{E}}$—excess chemical potential of nimesulide.