Standard state thermodynamic properties of aqueous sodium perrhenate using high dilution calorimetry up to 598.15 K

Standard state thermodynamic properties for aqueous sodium perrhenate at temperature in the range of (298.15 to 598.15) K and at p sat were determined by high dilution solution calorimetry down to 10 −4 m. Standard state partial molar heat capacities, C p , 2 ∘ , of aqueous sodium perrhenate calcula...

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Bibliographic Details
Published in:The Journal of chemical thermodynamics 2009-09, Vol.41 (9), p.1035-1041
Main Authors: Djamali, Essmaiil, Chen, Keith, Cobble, James W.
Format: Article
Language:English
Subjects:
Aqueous solutions
Calorimetric measurements
Chemical thermodynamics
Chemistry
Exact sciences and technology
General and physical chemistry
High pressures
High temperatures
Mixtures
Sodium perrhenate
Standard state thermodynamic properties
Thermodynamic properties
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Summary:Standard state thermodynamic properties for aqueous sodium perrhenate at temperature in the range of (298.15 to 598.15) K and at p sat were determined by high dilution solution calorimetry down to 10 −4 m. Standard state partial molar heat capacities, C p , 2 ∘ , of aqueous sodium perrhenate calculated from present study are compared to literature values up to T = 398.15 K. The differences between C p , 2 ∘ of ReO 4 - ( aq ) and Cl −(aq) at lower temperature is much greater than that due to their internal molecular motions. Consequently, the perrhenate ion appears to have an ionic incomplete primary hydration shell as compared to the chloride ion. The ReO 4 - / Cl - difference in thermodynamic functions has now been well defined up to T = 598.15 K for other important high temperature calculations.
ISSN:0021-9614
1096-3626
DOI:10.1016/j.jct.2009.04.004