Solvation Properties of N-Substituted Cis and Trans Amides Are Not Identical:  Significant Enthalpy and Entropy Changes Are Revealed by the Use of Variable Temperature1H NMR in Aqueous and Chloroform Solutions and ab Initio Calculations

2005 ◽  
Vol 109 (51) ◽  
pp. 11878-11884 ◽  
Author(s):  
Anastassios N. Troganis ◽  
Emilia Sicilia ◽  
Klimentini Barbarossou ◽  
Ioannis P. Gerothanassis ◽  
Nino Russo
Keyword(s):  
Ab Initio Calculations ◽  
Ab Initio ◽  
Entropy Changes ◽  
Enthalpy And Entropy Changes ◽  
Enthalpy And Entropy ◽  
Cis And Trans

scholarly journals Direct measurement of enthalpy and entropy changes in NH3 promoted O2 activation over Cu‐CHA at low temperature

ChemCatChem ◽  
2021 ◽  
Author(s):  
Xueting Wang ◽  
Lin Chen ◽  
Peter N. R. Vennestrøm ◽  
Ton V. W. Janssens ◽  
Jonas Jansson ◽  
...  
Keyword(s):  
Low Temperature ◽  
Direct Measurement ◽  
O2 Activation ◽  
Entropy Changes ◽  
Enthalpy And Entropy Changes ◽  
Enthalpy And Entropy

Liquid zinc chloride vaporization thermodynamics by modified entrainment

1988 ◽  
Vol 66 (4) ◽  
pp. 566-569 ◽  
Author(s):  
Peter J. Gardner ◽  
Peter Pang
Keyword(s):  
Zinc Chloride ◽  
Vapour Pressure ◽  
Liquid Zinc ◽  
Temperature Range ◽  
Saturated Vapour ◽  
Entropy Changes ◽  
Enthalpy And Entropy Changes ◽  
Enthalpy And Entropy ◽  
Increasing Temperature

The thermodynamics of the vaporization of liquid zinc chloride has been studied in the temperature range 638–978 K by the modified entrainment method. Enthalpy and entropy changes for vaporization have been derived for the monomer and dimer species. These values are unchanged in a melt contaminated with water at a mole ratio of 1%. The proportion of dimer in the saturated vapour is found to decrease with increasing temperature. The vapour pressure equations for monomer and dimer vaporization, ZnCl2(l) = ZnCl2(g) and 2ZnCl2(l) = Zn2Cl4(g) are In [p10/pӨ] = −(15300 ± 60)K/T + (15.39 ± 0.06) and In [p20/pӨ] = −(11000 ± 970)K/T + (6.5 ± 1.3) for the temperature range 640–980 K.

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