Computer Science
Scientific paper
Dec 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004gecoa..68.5151r&link_type=abstract
Geochimica et Cosmochimica Acta, Volume 68, Issue 24, p. 5151-5158.
Computer Science
2
Scientific paper
Enthalpies of dissolution in HF solutions have been measured at 323 K for a series of hydrous trachyte glasses. Enthalpies of mixing between water and molten trachyte have then been calculated from heat capacity data for the same set of samples and available enthalpy for pure water. The moderately negative enthalpies of mixing suggested at 1 bar by the measurements made on glasses almost disappear when trachyte liquids and water are referred to the same temperature, and particularly so when enthalpies of mixing are calculated for a few kbars pressure. As found for albite and phonolite liquids, trachyte melts thus appear to mix nearly ideally as far as enthalpy is concerned. These results imply that the enthalpy of exsolution of water from magmas is very small or negligible under the P-T-X conditions relevant to trachytic volcanism, even for complete degassing of up to 5 wt% H2O. Furthermore, the viscosity increase associated with exsolution-driven cooling is negligible compared to the decrease caused directly by water exsolution.
Hovis Guy
Richet Pascal
Roux Jacques
Whittington Alan
No associations
LandOfFree
Energetics of water dissolution in trachyte glasses and liquids does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Energetics of water dissolution in trachyte glasses and liquids, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Energetics of water dissolution in trachyte glasses and liquids will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1025663