Table 2 Limiting apparent molar volumes \(({\text{V}}_{\upphi }^{0}),\) experimental slopes \({(\text{S}}_{\text{V}})\), average relative deviation (σ), limiting apparent molar expansibility (\({\text{E}}_{\upphi }^{0}\)) and partial molar volume of transfer (\(\Delta_{{{\text{tr}}}} \mathsf{V}_{\upphi }^{0}\) for QUE and 7-HF with NAM of different concentrations in hydro-ethanolic medium as function of temperature and experimental pressure P = 101 kPa
\(T/\)K | \(\mathsf{V}_{\upphi }^{0}\)× 105\(/{\text{m}}^{3}{\text{mol}}^{-1}\) | \({\text{S}}_{v}\) × 105\(/{\text{m}}^{3}{\text{mol}}^{-2}\text{kg}\) | σ \(\times {10}^{3}\) | \({E}_{\upphi }^{0}/{\text{m}}^{3}{\text{mol}}^{-1}{\text{K}}^{-1}\) | \(\Delta_{{{\text{tr}}}} \mathsf{V}_{\upphi }^{0}\) × 10–2\(/{\text{m}}^{3}{\text{mol}}^{-1}\) | |||||
|---|---|---|---|---|---|---|---|---|---|---|
QUE | 7-HF | QUE | 7-HF | QUE | 7-HF | QUE | 7-HF | QUE | 7-HF | |
30 v/v EtOH + 0.5 m NAM | ||||||||||
293.15 | 2949.0 ± 10.7 | 1326.6 ± 11.4 | − 46,882.6 ± 17.4 | − 20,477.5 ± 11.2 | − 2.44 | − 2.98 | 38.62 | 14.29 | 19.85 | 7.83 |
298.15 | 3158.8 ± 20.5 | 1401.6 ± 14.7 | − 49,721.6 ± 39.5 | − 21,236.2 ± 12.5 | 4.20 | 8.82 | 37.09 | 12.83 | 21.47 | 7.88 |
303.15 | 3332.2 ± 21.3 | 1439.6 ± 12.3 | − 51,829.6 ± 40.2 | − 21,244.4 ± 19.4 | 1.50 | − 8.60 | 35.57 | 11.37 | 22.39 | 7.55 |
308.15 | 3481.8 ± 20.2 | 1523.4 ± 15.6 | − 53,634.5 ± 42.3 | − 22,143.5 ± 10.8 | − 5.56 | 2.94 | 34.04 | 9.90 | 23.38 | 7.50 |
313.15 | 3676.7 ± 20.7 | 1589.9 ± 17.2 | − 56,185.8 ± 52.7 | − 21,747.3 ± 12.9 | 2.49 | − 25.81 | 32.51 | 8.44 | 24.43 | 6.86 |
30 v/v EtOH + 1.0 m NAM | ||||||||||
293.15 | 2362.1 ± 27.4 | 1436.8 ± 18.0 | − 36,456.7 ± 16.6 | − 22,565.4 ± 12.1 | 2.77 | − 0.22 | 33.31 | 10.01 | 13.98 | 8.93 |
298.15 | 2500.4 ± 13.2 | 1488.7 ± 15.6 | − 37,933.3 ± 19.2 | − 22,873.8 ± 17.7 | − 4.75 | − 1.26 | 29.40 | 11.38 | 14.89 | 8.75 |
303.15 | 2645.8 ± 18.1 | 1555.1 ± 12.3 | − 39,193.1 ± 16.6 | − 23,403.1 ± 10.7 | − 1.43 | 2.65 | 25.49 | 12.76 | 15.53 | 8.70 |
308.15 | 2784.1 ± 11.2 | 1613.4 ± 14.0 | − 40,270.3 ± 17.5 | − 23,715.2 ± 13.5 | 6.06 | − 2.99 | 21.58 | 14.13 | 16.40 | 8.40 |
313.15 | 2857.6 ± 11.0 | 1693.4 ± 13.1 | − 40,309.3 ± 21.1 | − 24,310.5 ± 12.4 | − 2.74 | 0.65 | 17.67 | 15.51 | 16.24 | 8.30 |
40 v/v EtOH + 0.5 m NAM | ||||||||||
293.15 | 2795.3 ± 17.0 | 1431.7 ± 13.8 | − 42,061.5 ± 16.4 | − 22,865.0 ± 15.1 | − 4.58 | 1.20 | 18.03 | 22.41 | 20.23 | 9.03 |
298.15 | 2927.2 ± 19.3 | 1535.5 ± 10.0 | − 43,138.6 ± 15.3 | − 23,974.7 ± 13.3 | 8.17 | − 1.12 | 20.07 | 20.49 | 21.09 | 9.15 |
303.15 | 3013.4 ± 10.3 | 1632.2 ± 19.9 | − 43,579.6 ± 19.7 | − 24,793.1 ± 11.9 | 1.56 | − 1.65 | 22.10 | 18.56 | 21.41 | 8.48 |
308.15 | 3094.0 ± 12.8 | 1729.0 ± 13.7 | − 43,515.7 ± 23.2 | − 25,554.3 ± 10.5 | − 9.80 | 3.56 | 24.13 | 16.64 | 21.43 | 8.09 |
313.15 | 3264.3 ± 14.7 | 1799.1 ± 19.6 | − 45,456.7 ± 28.7 | − 25,857.1 ± 11.1 | 4.38 | − 1.22 | 26.16 | 14.72 | 21.13 | 8.47 |
40 v/v EtOH + 1.0 m NAM | ||||||||||
293.15 | 2886.9 ± 14.2 | 1047.0 ± 11.3 | − 46,107.5 ± 27.7 | − 16,146.7 ± 19.6 | 0.48 | − 2.34 | 28.96 | 19.30 | 21.25 | 5.18 |
298.15 | 3032.5 ± 12.6 | 1162.9 ± 14.9 | − 47,544.9 ± 24.4 | − 17,434.1 ± 15.9 | 0.26 | 8.92 | 29.51 | 21.91 | 22.15 | 5.42 |
303.15 | 3168.2 ± 10.9 | 1253.8 ± 17.6 | − 48,698.0 ± 19.6 | − 18,285.3 ± 17.2 | − 3.92 | − 11.84 | 30.05 | 24.53 | 22.96 | 4.70 |
308.15 | 3347.4 ± 15.8 | 1407.8 ± 14.4 | − 50,019.1 ± 14.5 | − 20,114.6 ± 12.1 | 4.52 | 7.09 | 30.60 | 27.15 | 23.96 | 4.88 |
313.15 | 3480.7 ± 10.5 | 1537.8 ± 21.4 | − 50,524.2 ± 19.7 | − 21,548.0 ± 16.5 | − 1.67 | − 1.44 | 31.14 | 29.76 | 23.29 | 5.86 |