Table 3. Few Apparent Thermodynamic Properties of RST in the {PEG400 (1) + Water (2)} Cosolvent Mixture at 298.15 K and Pressure (p) = 0.1 MPa^d.

w1a	f1a	x1a	x3c	δ1+2b	ΔsolnG°/kJ·mol–1c	/kJ·mol–1c
0.00	0.0	0.0	2.15 × 10–6	47.8	32.36	0.00
0.10	0.0898	0.0050	5.63 × 10–6	45.66	29.97	–2.39
0.20	0.1817	0.0111	8.92 × 10–6	43.48	28.83	–3.53
0.30	0.2757	0.0189	1.97 × 10–5	41.24	26.86	–5.49
0.40	0.3719	0.0292	5.27 × 10–5	38.95	24.42	–7.93
0.50	0.4704	0.0431	6.59 × 10–5	36.60	23.87	–8.49
0.60	0.5713	0.0633	7.91 × 10–5	34.20	23.42	–8.94
0.70	0.6745	0.0951	9.75 × 10–5	31.75	22.90	–9.46
0.80	0.7804	0.1527	1.39 × 10–4	29.23	22.02	–10.34
0.90	0.8888	0.2885	1.97 × 10–4	26.65	21.15	–11.20
1.00	1.0	1.0	6.70 × 10–4	24.0	18.12	–14.24

^aw₁, f₁, and x₁ are the mass, volume, and mole fractions of PEG 400 (1) in the {PEG 400 (1) + water (2)} mixtures free of RST (3). Volume fractions of PEG400 were calculated assuming additive behavior from density values reported by Rodriguez et al.²⁹

^bδ₁₊₂ is the Hildebrand solubility parameter of {PEG 400 (1) + water (2)} mixtures free of RST at 298.15 K.

^cx₃ is the mole fraction solubility of RST.

^dStandard uncertainties u are u (T) = 0.02 K for temperature and u (p) = 0.001 MPa for pressure with 0.95% level of confidence. x₃ = mole fraction solubility at standard uncertainties u of u (T) = 0.02 K for temperature and u (p) = 0.001 MPa for pressure with 0.95% level of confidence.