Počet záznamů: 1
Relative density and isobaric expansivity of cold and supercooled heavy water from 254 to 298 K and up to 100 MPa
- 1.
SYSNO ASEP 0509586 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Relative density and isobaric expansivity of cold and supercooled heavy water from 254 to 298 K and up to 100 MPa Tvůrce(i) Blahut, Aleš (UT-L) RID, ORCID
Hykl, Jiří (UT-L) RID, ORCID
Peukert, Pavel (UT-L) RID
Vinš, Václav (UT-L) RID, ORCID
Hrubý, Jan (UT-L) RID, ORCIDCelkový počet autorů 7 Číslo článku 034505 Zdroj.dok. Journal of Chemical Physics. - : AIP Publishing - ISSN 0021-9606
Roč. 151, č. 3 (2019)Poč.str. 18 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova heavy water ; supercooling ; density measurement ; equation of state Vědní obor RIV BJ - Termodynamika Obor OECD Thermodynamics CEP GA16-02647S GA ČR - Grantová agentura ČR GA19-05696S GA ČR - Grantová agentura ČR Způsob publikování Omezený přístup Institucionální podpora UT-L - RVO:61388998 UT WOS 000476588700016 EID SCOPUS 85069463336 DOI 10.1063/1.5100604 Anotace 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 heavy
water 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.Pracoviště Ústav termomechaniky Kontakt Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Rok sběru 2020 Elektronická adresa https://aip.scitation.org/doi/10.1063/1.5100604
Počet záznamů: 1