The high pressure isothermal compressibilities of deuterium oxide from 5 to 100 °C and 0 to 1000 bars applied or gauge pressure were determined from sound speed data. These compressibilities were used to derive an equation of state of the form V0P/(V0 - VP) = B + A 1P + A2P2, where V0 and V P are the specific volumes at an applied pressure of zero and P; and B, A1, and A2 are polynomial functions of temperature. The compressibilities derived from this equation of state are consistent with those derived from the sound speed data to ±0.016×10-6 bar-1 over the entire pressure and temperature range (this is equivalent to ∼0.2 m sec-1 in sound speed). The 1 atm sound-derived compressibilities agree on the average to ±0. 06×10-6 bar-1 with the direct measurements of Millero and Lepple. The P-V-T data from the sound-derived equation are compared with the high pressure work of Bridgman, Kesselman, Juza et al., and Emmet and Millero. Good agreement (average deviation of ±28×10-6 cm3 g-1) was found with the recent specific volume measurements of Emmet and Millero. The P-V-T properties of D2O are compared to pure water. D2O and H2O are shown to follow similar trends. Contrary to previous reports, the D2O/H2O ratios of the specific volumes and specific heats are shown to be functions of both temperature and pressure.
|Original language||English (US)|
|Number of pages||7|
|Journal||The Journal of Chemical Physics|
|State||Published - Dec 1 1974|
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Physical and Theoretical Chemistry