About: Heat capacity, enthalpy and entropy of calcium niobates

Facets (new session)
Description
Metadata
Settings
- owl:sameAs
- Inference Rule:

About: Heat capacity, enthalpy and entropy of calcium niobates Goto Sponge NotDistinct Permalink

An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

Attributes	Values
rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Heat capacity and enthalpy increments of calcium niobates CaNb2O6 and Ca2Nb2O7 were measured by the relaxation time method (2-300 K), DSC (260-360 K) and drop calorimetry (669-1421 K). Temperature dependencies of the molar heat capacity in the form Cpm=200.4+0.03432T-3.450?10^6/T^2 J/K/mol for CaNb2O6 and Cpm=257.2+0.03621T?4.435-10^6/T^2 J/K/mol for Ca2Nb2O7 were derived by the least-squares method from the experimental data. The molar entropies at 298.15 K, S_m^0(CaNb2O6,298.15 K)=167.3+-0.9 J/K/mol and S_m^0 (Ca2Nb2O7, 298.15 K)=212.4+-1.2 J/K/1 mol, were evaluated from the low temperature heat capacity measurements. Standard enthalpies of formation at 298.15 K were derived using published values of Gibbs energy of formation and presented heat capacity and entropy data: deltaHf^0(CaNb2O6, 298.15 K)= -2664.52 kJ/mol and deltafH^0 (Ca2Nb2O7,298.15 K)= -3346.91 kJ/mol. Heat capacity and enthalpy increments of calcium niobates CaNb2O6 and Ca2Nb2O7 were measured by the relaxation time method (2-300 K), DSC (260-360 K) and drop calorimetry (669-1421 K). Temperature dependencies of the molar heat capacity in the form Cpm=200.4+0.03432T-3.450?10^6/T^2 J/K/mol for CaNb2O6 and Cpm=257.2+0.03621T?4.435-10^6/T^2 J/K/mol for Ca2Nb2O7 were derived by the least-squares method from the experimental data. The molar entropies at 298.15 K, S_m^0(CaNb2O6,298.15 K)=167.3+-0.9 J/K/mol and S_m^0 (Ca2Nb2O7, 298.15 K)=212.4+-1.2 J/K/1 mol, were evaluated from the low temperature heat capacity measurements. Standard enthalpies of formation at 298.15 K were derived using published values of Gibbs energy of formation and presented heat capacity and entropy data: deltaHf^0(CaNb2O6, 298.15 K)= -2664.52 kJ/mol and deltafH^0 (Ca2Nb2O7,298.15 K)= -3346.91 kJ/mol. (en)
Title	Heat capacity, enthalpy and entropy of calcium niobates Heat capacity, enthalpy and entropy of calcium niobates (en)
skos:prefLabel	Heat capacity, enthalpy and entropy of calcium niobates Heat capacity, enthalpy and entropy of calcium niobates (en)
skos:notation	RIV/60461373:22340/09:00022006!RIV10-MSM-22340___
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(GA104/07/1209), P(GA525/07/0903), Z(MSM0021620834), Z(MSM6046137302), Z(MSM6046137307)
http://linked.open...iv/cisloPeriodika	2
http://linked.open...vai/riv/dodaniDat	2010
http://linked.open...aciTvurceVysledku	Leitner, Jindřich Sedmidubský, David Růžička, Květoslav
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Vysoká škola chemicko-technologická v Praze / Fakulta chemicko-inženýrská
http://linked.open...dnocenehoVysledku	316922
http://linked.open...ai/riv/idVysledku	RIV/60461373:22340/09:00022006
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Oxides; Strontium niobates; Calorimetry; Heat capacity; Enthalpy increments; Heat of formation; Entropy (en)
http://linked.open.../riv/klicoveSlovo	Oxides Heat of formation Entropy Calorimetry Enthalpy increments Heat capacity Strontium niobates
http://linked.open...odStatuVydavatele	NL - Nizozemsko
http://linked.open...ontrolniKodProRIV	[7CE7D83FC278]
http://linked.open...i/riv/nazevZdroje	Journal of Thermal Analysis and Calorimetry
http://linked.open...in/vavai/riv/obor	BJ
http://linked.open...ichTvurcuVysledku	3 (xsd:int)
http://linked.open...cetTvurcuVysledku	4 (xsd:int)
http://linked.open...vavai/riv/projekt	Thermochemical properties of lead-free ferroelectric oxides available for FeRAM fabrication Trace elements and their binding compounds in food and crops
http://linked.open...UplatneniVysledku	2009
http://linked.open...v/svazekPeriodika	95
http://linked.open...iv/tvurceVysledku	Růžička, Květoslav Svoboda, Pavel Leitner, Jindřich Sedmidubský, David
http://linked.open...ain/vavai/riv/wos	000264133800011
http://linked.open...n/vavai/riv/zamer	Condensed Matter Physics – New Materials and Technologies Preparation and research of functional materials and material technologies using micro- and nanoscopic methods Physico-chemical methods of analysis and characterization of chemical systems and biosystems
issn	1388-6150
number of pages	6 (xsd:int)
http://localhost/t...ganizacniJednotka	22340
is http://linked.open...avai/riv/vysledek of	Heat capacity, enthalpy and entropy of calcium niobates Heat capacity, enthalpy and entropy of calcium niobates Heat capacity, enthalpy and entropy of calcium niobates Heat capacity, enthalpy and entropy of calcium niobates

Faceted Search & Find service v1.16.118 as of Jun 21 2024

Alternative Linked Data Documents: ODE Content Formats:

RDF

ODATA

Microdata

About

OpenLink Virtuoso version 07.20.3240 as of Jun 21 2024, on Linux (x86_64-pc-linux-gnu), Single-Server Edition (126 GB total memory, 58 GB memory in use)
Data on this page belongs to its respective rights holders.
Virtuoso Faceted Browser Copyright © 2009-2024 OpenLink Software