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Vapor Pressure of Water at Its Triple Point: Highly Accurate Value.

PB258979

Publication Date	1976
Personal Author	Guildner, L. A.; Johnson, D. P.; Jones, F. E.
Page Count	2
Abstract	The vapor pressure of water at its triple point was measured with greatly increased accuracy. The triple point was realized with newly designed equipment that enhanced the stability of the pressure and permitted any air released from solution to be removed by pumping. A diaphragm pressure transducer separated the water vapor from the helium used to transmit the pressure to the manometer. The pressure was measured with the NBS precision mercury manometer. The vapor pressure at the triple point was found to be 611.657 Pa with random uncertainties at the 99% confidence level of plus or minus 0.010 Pa. The systematic errors are estimated to be relatively insignificant.
Keywords	Water Vapor pressure Critical point Manometers Thermodynamic properties Reprints
Source Agency	National Institute of Standards and Technology
NTIS Subject Category	99F - Physical & Theoretical Chemistry
Corporate Authors	National Bureau of Standards, Washington, D.C. Inst. for Basic Standards.
Supplemental Notes	Pub. in American Association for the Advancement of Science, v191 p1261, 26 Mar 76.(PC A02/MF A01)
Document Type	Journal Article
Title Note	Final rept.
NTIS Issue Number	197703

Vapor Pressure of Water at Its Triple Point: Highly Accurate Value.

Vapor Pressure of Water at Its Triple Point: Highly Accurate Value.
PB258979

Publication Date	1976
Personal Author	Guildner, L. A.; Johnson, D. P.; Jones, F. E.
Page Count	2
Abstract	The vapor pressure of water at its triple point was measured with greatly increased accuracy. The triple point was realized with newly designed equipment that enhanced the stability of the pressure and permitted any air released from solution to be removed by pumping. A diaphragm pressure transducer separated the water vapor from the helium used to transmit the pressure to the manometer. The pressure was measured with the NBS precision mercury manometer. The vapor pressure at the triple point was found to be 611.657 Pa with random uncertainties at the 99% confidence level of plus or minus 0.010 Pa. The systematic errors are estimated to be relatively insignificant.
Keywords	Water Vapor pressure Critical point Manometers Thermodynamic properties Reprints
Source Agency	National Institute of Standards and Technology
NTIS Subject Category	99F - Physical & Theoretical Chemistry
Corporate Authors	National Bureau of Standards, Washington, D.C. Inst. for Basic Standards.
Supplemental Notes	Pub. in American Association for the Advancement of Science, v191 p1261, 26 Mar 76.(PC A02/MF A01)
Document Type	Journal Article
Title Note	Final rept.
NTIS Issue Number	197703