Thermodynamics Research Center / ThermoML | International Journal of Thermophysics

Effect of KCl and KNO3 on Partial Molal Volumes and Partial Molal Compressibilities of Some Amino Acids at Different Temperatures

Riyazudden, Khan, I.[Imran]
Int. J. Thermophys. 2009, 30, 2, 475-489
ABSTRACT
Density (n) and ultrasonic velocity (u) values of amino acids l-alanine, l-proline, l-valine, and l-leucine in 2M aqueous KCl and 2M aqueous KNO3 solutions have been measured as a function of amino acid concentration at different temperatures (298.15 K, 303.15 K, 308.15 K, 313.15 K, 318.15 K, and 323.15 K). Using the n and u data, partial molal volume (oo v ) and partial molal isentropic compressibility (oo k ) values have been computed. The increase in partial molal volume with temperature has been attributed to the volume expansion of hydrated zwitterions. The oo v and oo k values of l-alanine, l-proline, l-valine, and l-leucine in 2M aqueous KCl and KNO3 solutions have been found to be larger than the corresponding values in water. The larger partialmolal volumes of l-alanine, l-proline, l-valine, and l-leucine in 2Maqueous KCl and KNO3 solutions have been ascribed to the formation of zwitterion- K+/Cl./NO3. and K+/Cl./NO3. water dipole aggregates in solutions. The formation of these entities in solutions causes the release of water associated with zwitterions to the bulk water. The larger partial molal compressibilities of l-alanine-/ l-proline-/l-valine-/l-leucine 2M aqueous KCl/KNO3 solutions than the corresponding values in water have been attributed to the formation of zwitterion ion and ion water dipole incompressible entities in solutions.
Compounds
# Formula Name
1 C3H7NO2 (S)-2-aminopropanoic acid
2 C5H9NO2 L-proline
3 C6H13NO2 L-leucine
4 ClK potassium chloride
5 KNO3 potassium nitrate
6 H2O water
7 C5H11NO2 L-valine
Datasets
The table above is generated from the ThermoML associated json file (link above). POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied; the numbers refer to the table of compounds on the left.
Type Compound-# Property Variable Constraint Phase Method #Points
  • POMD
  • 4
  • 6
  • Speed of sound, m/s ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Amount concentration (molarity), mol/dm3 - 4; Liquid
  • Liquid
  • LVPAI:UFactor:2
  • 6
  • POMD
  • 4
  • 6
  • Mass density, kg/m3 ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Amount concentration (molarity), mol/dm3 - 4; Liquid
  • Liquid
  • PYCNOM:UFactor:6
  • 6
  • POMD
  • 6
  • 5
  • Speed of sound, m/s ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Amount concentration (molarity), mol/dm3 - 5; Liquid
  • Liquid
  • LVPAI:UFactor:2
  • 9
  • POMD
  • 6
  • 5
  • Mass density, kg/m3 ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Amount concentration (molarity), mol/dm3 - 5; Liquid
  • Liquid
  • PYCNOM:UFactor:6
  • 6
  • POMD
  • 1
  • 4
  • 6
  • Speed of sound, m/s ; Liquid
  • Temperature, K; Liquid
  • Molality, mol/kg - 1; Liquid
  • Pressure, kPa; Liquid
  • Solvent: Amount concentration (molarity), mol/dm3 - 4; Liquid
  • Liquid
  • LVPAI:UFactor:2
  • 48
  • POMD
  • 1
  • 4
  • 6
  • Mass density, kg/m3 ; Liquid
  • Temperature, K; Liquid
  • Molality, mol/kg - 1; Liquid
  • Pressure, kPa; Liquid
  • Solvent: Amount concentration (molarity), mol/dm3 - 4; Liquid
  • Liquid
  • PYCNOM:UFactor:6
  • 48
  • POMD
  • 1
  • 6
  • 5
  • Speed of sound, m/s ; Liquid
  • Temperature, K; Liquid
  • Molality, mol/kg - 1; Liquid
  • Pressure, kPa; Liquid
  • Solvent: Amount concentration (molarity), mol/dm3 - 5; Liquid
  • Liquid
  • LVPAI:UFactor:2
  • 48
  • POMD
  • 1
  • 6
  • 5
  • Mass density, kg/m3 ; Liquid
  • Temperature, K; Liquid
  • Molality, mol/kg - 1; Liquid
  • Pressure, kPa; Liquid
  • Solvent: Amount concentration (molarity), mol/dm3 - 5; Liquid
  • Liquid
  • PYCNOM:UFactor:6
  • 48
  • POMD
  • 2
  • 4
  • 6
  • Speed of sound, m/s ; Liquid
  • Temperature, K; Liquid
  • Molality, mol/kg - 2; Liquid
  • Pressure, kPa; Liquid
  • Solvent: Amount concentration (molarity), mol/dm3 - 4; Liquid
  • Liquid
  • LVPAI:UFactor:2
  • 48
  • POMD
  • 2
  • 4
  • 6
  • Mass density, kg/m3 ; Liquid
  • Temperature, K; Liquid
  • Molality, mol/kg - 2; Liquid
  • Pressure, kPa; Liquid
  • Solvent: Amount concentration (molarity), mol/dm3 - 4; Liquid
  • Liquid
  • PYCNOM:UFactor:6
  • 48
  • POMD
  • 2
  • 6
  • 5
  • Speed of sound, m/s ; Liquid
  • Temperature, K; Liquid
  • Molality, mol/kg - 2; Liquid
  • Pressure, kPa; Liquid
  • Solvent: Amount concentration (molarity), mol/dm3 - 5; Liquid
  • Liquid
  • LVPAI:UFactor:2
  • 48
  • POMD
  • 2
  • 6
  • 5
  • Mass density, kg/m3 ; Liquid
  • Temperature, K; Liquid
  • Molality, mol/kg - 2; Liquid
  • Pressure, kPa; Liquid
  • Solvent: Amount concentration (molarity), mol/dm3 - 5; Liquid
  • Liquid
  • PYCNOM:UFactor:6
  • 48
  • POMD
  • 7
  • 4
  • 6
  • Speed of sound, m/s ; Liquid
  • Temperature, K; Liquid
  • Molality, mol/kg - 7; Liquid
  • Pressure, kPa; Liquid
  • Solvent: Amount concentration (molarity), mol/dm3 - 4; Liquid
  • Liquid
  • LVPAI:UFactor:2
  • 48
  • POMD
  • 7
  • 4
  • 6
  • Mass density, kg/m3 ; Liquid
  • Temperature, K; Liquid
  • Molality, mol/kg - 7; Liquid
  • Pressure, kPa; Liquid
  • Solvent: Amount concentration (molarity), mol/dm3 - 4; Liquid
  • Liquid
  • PYCNOM:UFactor:6
  • 48
  • POMD
  • 7
  • 6
  • 5
  • Speed of sound, m/s ; Liquid
  • Temperature, K; Liquid
  • Molality, mol/kg - 7; Liquid
  • Pressure, kPa; Liquid
  • Solvent: Amount concentration (molarity), mol/dm3 - 5; Liquid
  • Liquid
  • LVPAI:UFactor:2
  • 48
  • POMD
  • 7
  • 6
  • 5
  • Mass density, kg/m3 ; Liquid
  • Temperature, K; Liquid
  • Molality, mol/kg - 7; Liquid
  • Pressure, kPa; Liquid
  • Solvent: Amount concentration (molarity), mol/dm3 - 5; Liquid
  • Liquid
  • PYCNOM:UFactor:6
  • 48
  • POMD
  • 3
  • 4
  • 6
  • Speed of sound, m/s ; Liquid
  • Temperature, K; Liquid
  • Molality, mol/kg - 3; Liquid
  • Pressure, kPa; Liquid
  • Solvent: Amount concentration (molarity), mol/dm3 - 4; Liquid
  • Liquid
  • LVPAI:UFactor:2
  • 48
  • POMD
  • 3
  • 4
  • 6
  • Mass density, kg/m3 ; Liquid
  • Temperature, K; Liquid
  • Molality, mol/kg - 3; Liquid
  • Pressure, kPa; Liquid
  • Solvent: Amount concentration (molarity), mol/dm3 - 4; Liquid
  • Liquid
  • PYCNOM:UFactor:6
  • 48
  • POMD
  • 3
  • 6
  • 5
  • Speed of sound, m/s ; Liquid
  • Temperature, K; Liquid
  • Molality, mol/kg - 3; Liquid
  • Pressure, kPa; Liquid
  • Solvent: Amount concentration (molarity), mol/dm3 - 5; Liquid
  • Liquid
  • LVPAI:UFactor:2
  • 48
  • POMD
  • 3
  • 6
  • 5
  • Mass density, kg/m3 ; Liquid
  • Temperature, K; Liquid
  • Molality, mol/kg - 3; Liquid
  • Pressure, kPa; Liquid
  • Solvent: Amount concentration (molarity), mol/dm3 - 5; Liquid
  • Liquid
  • PYCNOM:UFactor:6
  • 48