Comp. Mn+ T/K free energy change
(kJ mol-1)
Enthalpy change
( kJ mol-1)
Entropy change
( J mol-1 K-1)
  - ΔG1  - ΔG2 ΔH1  ΔH2 ΔS1  ΔS2
  Mn2+ 298 28.52 23.96 33.55 32.63 208.31 189.91
AAS   308 30.54 25.77     208.11 189.61
    318 32.69 27.76     208.32 189.92
  Co2+ 298 29.55 24.93 26.35 30.82 187.60 187.09
    308 31.55 26.71     187.98 186.80
    318 33.30 28.67     187.59 187.10
  Ni2+ 298 29.89 25.27 25.45 29.00 185.73 182.13
    308 31.90 27.00     186.21 181.84
    318 33.61 28.92     185.72 182.14
  Cu2+ 298 31.03 26.30 31.63 26.37 210.30 176.75
    308 33.14 28.24     210.31 177.33
    318 34.70 29.83     208.60 176.74
PAAS Mn2+ 298 42.45 36.57 40.82   37.21 279.43 247.59
    308 45.23 39.09     279.39 247.75
    318 48.04 41.52     279.43 247.59
  Co2+ 298 43.53 37.60 39.01 35.36 276.99 244.83
    308 46.29 39.98     276.96 244.62
    318 49.07 42.49     276.99 244.84
  Ni2+ 298 44.04 37.94 35.36 30.01 266.47 228.03
    308 46.64 40.45     272.07 228.78
    318 49.50 43.04     272.49 229.74
  Cu2+ 298 45.36 39.19 36.26 35.38 273.89 250.26
    308 48.00 41.69     273.58 250.24
    318 50.84 44.20     273.90 250.26
Table 5: Thermodynamic functions for ML and ML2 complexes of AAS and PAAS in 20 % (by volume) ethanol-water mixture and 0.1 M KCl.