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ASTM E2071-21
Standard Practice for Calculating Heat of Vaporization or Sublimation from Vapor Pressure Data
Translate name
STANDARD published on 1.3.2021
The information about the standard:
Designation standards: ASTM E2071-21
Note: WITHDRAWN
Publication date standards: 1.3.2021
SKU: NS-1022195
The number of pages: 4
Approximate weight : 12 g (0.03 lbs)
Country: American technical standard
Category: Technical standards ASTM
The category - similar standards:
Annotation of standard text ASTM E2071-21 :
Keywords:
Antoine equation, Clausius-Clapeyron equation, enthalpy of sublimation, enthalpy of vaporization, Haggenmacher equation, heat of sublimation, heat of vaporization, vapor pressure,, ICS Number Code 27.040 (Gas and steam turbines. Steam engines)
Additional information
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1.1This practice describes the calculation of the heat of vaporization of a liquid or the heat of sublimation of a solid from measured vapor pressure data. It is applicable to pure liquids, azeotropes, pure solids, and homogenous solid solutions over the temperature range for which the vapor pressure equation fitted to the measured data is applicable. Note 1:This practice is generally not applicable to liquid
mixtures. For a pure liquid or azeotrope, composition does not
change upon vaporization so that the integral heat of vaporization
is identical to the differential heat of vaporization.
Non-azeotropic liquid mixtures change composition upon vaporizing.
Heat of vaporization data computed from this practice for a liquid
mixture are valid only as an approximation to the mixture
differential heat of vaporization; it is not a valid approximation
to the mixture integral heat of vaporization.
1.2The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.3This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.4This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. |
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