Relative density and isobaric expansivity of cold and supercooled heavy water from 254 to 298 K and up to 100 MPa

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F19%3A00509586" target="_blank" >RIV/61388998:_____/19:00509586 - isvavai.cz</a>

Result on the web

<a href="https://aip.scitation.org/doi/10.1063/1.5100604" target="_blank" >https://aip.scitation.org/doi/10.1063/1.5100604</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1063/1.5100604" target="_blank" >10.1063/1.5100604</a>

Result language

angličtina

Original language name

Relative density and isobaric expansivity of cold and supercooled heavy water from 254 to 298 K and up to 100 MPa

Original language description

A dual-capillary apparatus was developed for highly accurate measurements of density of liquids, including the supercooled liquid region. The device was used to determine the density of supercooled heavy water in the temperature range from 254 K to 298 K at pressures ranging from atmospheric to 100 MPa, relative to density at reference isotherm 298.15 K. The measurements of relative density were reproducible within 10 ppm, and their expanded (k = 2) uncertainty was within 50 ppm. To obtain absolute values of density, thermodynamic integration was performed using recent accurate speed of sound measurements in the stable liquid region. An empirical equation of state (EoS) was developed, giving specific volume as a rational function of pressure and temperature. The new experimental data are represented by EoS within their experimental uncertainty. Gibbs energy was obtained by EoS integration allowing computation of all thermodynamic properties of heavynwater using Gibbs energy derivatives. Although based on data in relatively narrow temperature and pressure ranges, the developed EoS shows an excellent agreement with literature data for densities, isothermal compressibilities, and isobaric expansivities of deeply supercooled heavy water. The curvature of the thermodynamic surface steeply increases toward low temperatures and low pressures, thus supporting the existence of the hypothesized liquid-liquid coexistence boundary in a close vicinity of existing experimental data.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

20303 - Thermodynamics

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2019

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Chemical Physics

ISSN

0021-9606

e-ISSN

—

Volume of the periodical

151

Issue of the periodical within the volume

3

Country of publishing house

US - UNITED STATES

Number of pages

18

Pages from-to

034505

UT code for WoS article

000476588700016

EID of the result in the Scopus database

2-s2.0-85069463336