Table 4.

Experimental and Correlated Mole Fraction Solubility of WS·IPA (x₁) in the Binary Solvent Mixture of IPA (2) + Acetone (3) at Different Temperatures, T, and at Pressure, p = 101.3 kPa^a

		Apelblat		λh				Apelblat		λh
T/K	103 $x_1^{\text{exp}}$	103 $x_1^{\text{cal}}$	102 RD	103 $x_1^{\text{cal}}$	102 RD	T/K	103 $x_1^{\text{exp}}$	103 $x_1^{\text{cal}}$	102 RD	103 $x_1^{\text{cal}}$	102 RD
w3 = 0.047						w3 = 0.111
280.3	1.36	1.39	−2.70	1.32	2.33	281.2	1.99	2.04	−2.68	2.01	−1.05
287.1	1.53	1.56	−1.95	1.55	−1.06	283.3	2.14	2.15	−0.82	2.13	0.21
290.8	1.73	1.67	3.10	1.68	2.46	294.0	2.95	2.81	4.50	2.84	3.66
296.6	1.97	1.87	4.97	1.92	2.93	306.3	3.79	3.82	−0.97	3.87	−2.21
304.9	2.17	2.23	−2.99	2.29	−5.52	318.0	5.02	5.11	−1.97	5.12	−2.14
312.5	2.60	2.66	−2.18	2.68	−3.25	322.7	5.82	5.75	1.26	5.71	1.81
320.4	3.25	3.21	1.14	3.15	2.95
w3 = 0.148
283.6	2.97	3.15	−6.10	3.16	−6.47
290.2	3.85	3.65	5.26	3.65	5.18
296.2	4.25	4.16	2.09	4.15	2.19
307.3	5.14	5.24	−1.83	5.22	−1.59
314.1	5.94	6.00	−1.05	5.99	−0.89
320.5	6.75	6.79	−0.65	6.79	−0.69
322.8	7.18	7.09	1.23	7.10	1.08

^aStandard uncertainty, u, is u(T) = 2 K. Relative standard uncertainties, u_r are u_r(p) = 0.1, u_r(x₁) = 0.01, and u_r(w₃) = 0.001. $x_1^{\text{cal}}$ refers to the experimental mole fraction solubility. $x_1^{\text{exp}}$ refers to the calculated solubility data using the Apelblat and λh model equations. RD represents the corresponding relative deviation. w₃ is the mass fraction of acetone (3) in a binary IPA (2) + acetone (3) mixture.