Thermodynamic investigation on the aqueous mixtures of choline chloride/propylene glycol deep eutectic solvent at T = (293.15 to 313.15) K

Table 2 The density data (g·cm^–3) for a binary mixtures of ChCl/PG DES + water at different temperatures^a

x_DES^b,c	293.2 K	298.2 K	303.2 K	308.2 K	313.2 K
0.0000	0.998 ± 0.000	0.997 ± 0.001	0.996 ± 0.000	0.994 ± 0.005	0.992 ± 0.000
0.0213	1.009 ± 0.001	1.007 ± 0.000	1.005 ± 0.000	1.003 ± 0.001	1.000 ± 0.000
0.0467	1.018 ± 0.001	1.016 ± 0.000	1.014 ± 0.000	1.011 ± 0.000	1.009 ± 0.001
0.0775	1.028 ± 0.000	1.025 ± 0.000	1.023 ± 0.000	1.020 ± 0.002	1.018 ± 0.000
0.1155	1.038 ± 0.000	1.035 ± 0.000	1.032 ± 0.0000	1.029 ± 0.001	1.026 ± 0.000
0.1638	1.047 ± 0.000	1.044 ± 0.000	1.041 ± 0.000	1.038 ± 0.000	1.035 ± 0.000
0.2271	1.056 ± 0.010	1.052 ± 0.002	1.050 ± 0.001	1.046 ± 0.000	1.043 ± 0.000
0.3137	1.064 ± 0.000	1.060 ± 0.000	1.058 ± 0.000	1.054 ± 0.002	1.051 ± 0.001
0.4394	1.071 ± 0.000	1.067 ± 0.001	1.0650 ± 0.000	1.061 ± 0.000	1.058 ± 0.002
0.6381	1.076 ± 0.002	1.072 ± 0.001	1.069 ± 0.001	1.065 ± 0.002	1.063 ± 0.001
1.0000	1.077 ± 0.003	1.073 ± 0.003	1.071 ± 0.000	1.067 ± 0.000	1.065 ± 0.001

^aStandard uncertainty (u) for pressure, temperature, mole fraction of DESs and density is u (P) = 0.5 kPa, u (T) = 0.1 K, u (x_DES) = 0.005, u (ρ_m) = 0.05 kg m⁻³, respectively
^bx_DES is the mole fraction of ChCl/PG DESs dissolved in water
^cStandard uncertainty (u) for DES composition was estimated to be less than 0.05 mol ratio

ISSN: 2661-801X