Dissociation Pressures of the Phase CO2· 5 3/4 H2O

Abstract

The dissociation pressure of the solid phase CO₂ · 5 H₂O has been measured to 2,000 bars. This dissociation curve rises from 45 bars at 10° C. to 2,000 bars at 19.7° The solid hydrate freezes from immiscible water-rich and rich liquids over this pressure and temperature interval. ΔV of dissociation ranges from 24 cc/mole to 4 cc/mole. The density of the hydrate calculated from the dissociation pressure curve is in good agreement with the density obtained by other investigators from X-ray measurements. The application of the phase relations in the system CO₂-H₂O to the study of fluid inclusions in discussed.