
TY  - JOUR
A1  - Fenby, DV 
A1  - Chand, A 
T1  - Enthalpy of the isotopic exchange reaction H<sub>2</sub>O + D<sub>2</sub>O &#8594; 2HDO
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1978
VL  - 31
IS  - 2
SP  - 241
EP  - 245
KW  - 
UR  - https://doi.org/10.1071/CH9780241 
N2  - The enthalpy of the reaction                           H2O(l)+D2O() &#8594; 2HDO(l)  at 298 K is calculated from the statistical-mechanical enthalpy of the corresponding gas-phase reaction and recent vapour-pressure isotope effect results. Enthalpies of the same reaction obtained from calorimetric results by assuming that the H2O + HDO + D2O liquid mixture is an ideal solution agree, to within the estimated uncertainities, with the calculated value. It is concluded that any 'physical' contributions are less than 20% of the measured enthalpy changes. Molar excess enthalpies of D2O(l)+H2O(l) at 298.15 K are reported and compared with earlier studies. Enthalpies of reaction obtained from our excess enthalpies show a systematic variation with mole fraction. 
ER  -

