2. Pyrotech. XIV. If you have a user account, you will need to reset your password the next time you login. Thermal properties of POCO process graphite, Markelov, N.V.; Volga, V.I. The computer you are using is not registered by an institution with a subscription to this article. Temperature dependence of the heat capacity and change in the thermodynamic functions of strontium-alloyed AK1M2 alloy Izatullo N. Ganiev1, Suhrob E. Otajonov2, Nasim F. Ibrohimov3, M. Mahmudov2 1 V. I. Nikitin Institute of Chemistry, Academy of Sciences of the Republic of Tajikistan, 299/2 Aini Str., Dushanbe 734063, Tajikistan ; Buchnev, L.M., Data compilation copyright a) Specific heat capacity is temperature dependent. On the basis of some recent studies for … The temperature dependence of the thermal conductivity of crystalline solids is governed by the temperature dependence of the phonon specific heat and the rates of phonon scattering on other phonons, impurities, defects, charge carriers, boundaries, and dislocations [15 19]. ; Groot, H., Data Program, but require an annual fee to access. Number 5, 1 International Bureau of Weights and Measures, Bureau International des Poids et Mesures, Pavillon de Breteuil, F-92312 Sèvres cedex, France, Received 21 November 2006 Mefeorifrcs & Planefary Science 34, 121-127 (1999) 0 Meteoritical Society, 1999.Printed in USA. such sites. [all data], Isaacs and Wang, 1981 [all data], Markelov, Volga, et al., 1973 The specific heat of high‐purity Acheson graphite prepared by the National Carbon Company has been measured from 13° to 300°K. [all data], Lutcov, Volga, et al., 1970 Former measurements of the specific heat capacity of graphite at room temperature can be found in the literature [3, 17–21], where c g varies by more than 10% and its temperature dependence varies by nearly 50%. Your institution may already be a subscriber. Melting Point. Two different experimental procedures have been applied. J. Chem. Upon irradiation in a reactor, a number of significant changes take place driven by different components of the radiation field to which the graphite is exposed. You will only need to do this once. b) Temperature exchanges will alter the results and might introduce statistical and systematic uncertainties in the interpretation of the temperature rise. Thermal conductivity, electric resistivity and specific heat of dense graphites, DeSorbo, W., Vys. The International Bureau of Weights and Measures (BIPM) was set up by the Metre Convention and has its headquarters near Paris, France. In the region 13° to 54°K the Cp data follows a T2 dependence quite accurately in agreement with previous experimental work and recent theoretical investigations of specific heat in strongly anisotropic solids. Data from NIST Standard Reference Database 69: The National Institute of Standards and Technology (NIST) Heat content and heat capacity of an extruded graphite from 341° to 1723°K, Database and to verify that the data contained therein have If the temperature dependence of the heat capacity is known, it can be incorporated into the integral in Equation \ref{EQ1}. It is therefore necessary to measure the specific heat capacity over the entire temperature range to be used for the calorimeter. on behalf of the United States of America. Temp., 1972, 10, 997-1001. You do not need to reset your password if you login via Athens or an Institutional login. [all data], DeSorbo, 1955 17th, 1981, 55-61. Int. Determination of heat capacity of explosives and related materials by DSC, At room temperature, the specifi c heat of graphite is C p ≈ 0.7 J g –1 K , approximately one-third of the classical upper limit. Phys., 1953, 21, 1660-1663. Isaacs, L.L. Eng. Mater., 1973, 49, 45-56. temperature dependence curve. ; Entropy of solid at standard conditions (1 bar). Susanne Picard1, David T Burns1 and Philippe Roger1, Published 12 September 2007 • ; Belevich, I.S. Data, 1965, 10, 243. errors or omissions in the Database. All rights reserved. Lutcov, A.I. The specific heat capacity of a particular graphite sample is determined to be 706.9 J K−1 kg−1 with a combined relative standard uncertainty of 9 parts in 104 at 295.15 K. The specific heat capacity of cyanoacrylate has also been determined. uses its best efforts to deliver a high quality copy of the NIST / TRC Web Thermo Tables, professional edition (thermophysical and thermochemical data) The specifi c heat and heat capacity are sometimes used interchangeably, with units of joules per kelvin per unit mass, per unit volume, The most sensitive to changes in the intensity of molecular motion is the heat capacity. Purchase this article from our trusted document delivery partners. Its mandate is to provide the basis for a single, coherent system of measurements throughout the world, traceable to the International System of Units (SI). Am. In an adiabatic vacuum calorimeter, a temperature dependence of heat capacity of four allotropic modifications of carbon, viz, synthetic diamond, graphite, carbyne and fullerene C 60, has been studied in the (5–340) K range. Am. Some heat capacity, entropy and free energy data for cyclic substances, been selected on the basis of sound scientific judgment. Form and we will follow up with your librarian or Institution on your behalf. In the extremely high temperature area, where the εt h of the material is not known, it is offered to enter into experiment the third cylinder and to measure the temperature dependence of coefficient k (method of three cylinders). A common empirical model used to fit heat capacities over broad temperature ranges is \[C_p(T) = a+ bT + \dfrac{c}{T^2} \label{EQ15}\] Standard Reference Data Act. Taylor, R.E.

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