The pvt properties of water v*. the fluid to 1 kbar at 350-500 °c and along the saturation line from 150 to 350 °c

Abstract
The density of water has been measured from low pressures to 1 kbar (1 bar = 10 5 Pa) at 25 K intervals from 350 to 500 °C and the density change on condensation has been measured from 150 to 350 °C by injecting water into a 35 cm 3 high-temperature vessel that can be completely filled in a single delivery from the screw injector used in earlier work. The thermal expansion of the vessel was determined by a gas-expansion method. The estimated uncertainty caused by the uncertainty of the volume of the vessel at low pressure is 0.02 kg m -3 at 150 °C and 0.08 kg m -3 at all other temperatures, and the uncertainty arising from the uncertainty in the compression of the vessel is 0.10 kg m -3 kbar -1 .

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