Experimental evidence for the remarkable behavior of the partial molar heat capacity at infinite dilution of aqueous electrolytes at the critical point

1982 ◽  
Vol 86 (25) ◽  
pp. 4948-4951 ◽  
Author(s):  
Jeffrey A. Gates ◽  
Robert H. Wood ◽  
Jacques R. Quint
Keyword(s):  
Heat Capacity ◽  
Experimental Evidence ◽  
Critical Point ◽  
Infinite Dilution ◽  
Molar Heat Capacity ◽  
Aqueous Electrolytes ◽  
Partial Molar Heat Capacity

Partial molar heat capacity of adsorbed water on an ion-exchanger

1985 ◽  
Vol 92 ◽  
pp. 341-344 ◽  
Author(s):  
A. Nolasco ◽  
E. Julien ◽  
J. Besombes-Vailhe
Keyword(s):  
Heat Capacity ◽  
Molar Heat Capacity ◽  
Adsorbed Water ◽  
Ion Exchanger ◽  
Partial Molar Heat Capacity

Standard Partial Molar Heat Capacity and the Volume of the Cadmium Ion in Acetonitrile at 298.15 K

2018 ◽  
Vol 92 (11) ◽  
pp. 2107-2110
Author(s):  
Ya. I. Doronin ◽  
A. N. Novikov ◽  
L. Yu. Rassokhina ◽  
E. I. Kostyleva ◽  
V. A. Vasilev ◽  
...  
Keyword(s):  
Heat Capacity ◽  
Molar Heat Capacity ◽  
Partial Molar Heat Capacity ◽  
Cadmium Ion

Enthalpies of solution, limiting solubilities, and partial molar heat capacities of n-alcohols in water and in trehalose crowded media

2014 ◽  
Vol 86 (2) ◽  
pp. 223-231 ◽  
Author(s):  
Guangyue Bai ◽  
Sandra C.C. Nunes ◽  
Marisa A.A. Rocha ◽  
Luís M.N.B.F. Santos ◽  
M. Ermelinda S. Eusébio ◽  
...  
Keyword(s):  
Heat Capacity ◽  
Molar Heat Capacity ◽  
Enthalpy Of Solution ◽  
Biological Fluids ◽  
Aqueous Media ◽  
Aqueous Solubility ◽  
Enthalpies Of Solution ◽  
Partial Molar Heat Capacity ◽  
Polar Solutes ◽  
Hydrophobic Solvation

Abstract The enthalpies of solution of alcohols were determined by calorimetry in HEPES and (HEPES + trehalose) at 298.15 K. The used methodology and experiment’s design allowed us to extract from a single titration experiment the enthalpy of solution (ΔsolHm), the limiting solubility of the alcohol in each aqueous media, and an estimation of the enthalpy of solution of water in the alcohol phase. From these values the changes in Gibbs energy (ΔsolGm) and in entropy (ΔsolSm) of solution were derived. A decrease in solubility for 1-butanol and 1-pentanol in the crowded media (HEPES + trehalose) was observed which is driven by a significant decrease in the favorable enthalpy of solution. The partial molar heat capacity, in each media was determined in our heat capacity drop calorimeter, also at 298.15 K. A significant decrease of the partial molar heat capacity was observed for both alcohols in (HEPES + trehalose), which together with the obtained decrease in favorable ΔsolHm, is consistent with a decrease in hydrophobic solvation, as a result of a decrease in free solvent availability induced by the trehalose. Finally, we tentatively predict that in the aqueous media of the crowded solutions that characterize cells and biological fluids, solutes with low aqueous solubility will be more soluble, whereas the solubility of highly polar solutes will be reduced.

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