Abstract
The enthalpies of the reactions in which carbon dioxide hydrate is dissociated to carbon dioxide vapor and either water or ice are determined by an analysis with the Clapeyron equation. The most important feature of the new analysis is the direct use of the Clapeyron equation rather than the Clausius-Clapeyron equation. The analysis takes into account the finite volumes of the condensed phases, the nonideality of the vapor phase, and the solubility of carbon dioxide in water. New data for the solubility in the vicinity of the (water + hydrate + vapor) coexistence curve are employed. The enthalpy change of the reaction CO 2 · nH 2O(s)=CO 2(g)+ nH 2O(l) is found to vary from (63.6 ± 1.8) kJ · mol −1 to (57.7 ± 1.8) kJ · mol −1 between quadruple points Q1 and Q2, and the hydration number varies from (6.6 ± 0.3) to (5.6 ± 0.3) over the same range. The results are compared to values reported in the literature that were determined by various techniques.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
