ASTM E2071 - 00(2015) - Standard Practice for Calculating Heat of Vaporization or Sublimation from Vapor Pressure Data

ASTM E2071 - 00(2015)

Standard Practice for Calculating Heat of Vaporization or Sublimation from Vapor Pressure Data

Status : Current   Published : January 2015

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1.1 This 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.

1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.3 There is no ISO standard equivalent to this practice.

1.4  This 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 and health practices and determine the applicability of regulatory limitations prior to use.




Standard NumberASTM E2071 - 00(2015)
TitleStandard Practice for Calculating Heat of Vaporization or Sublimation from Vapor Pressure Data
StatusCurrent
Publication Date05 January 2015
Normative References(Required to achieve compliance to this standard)No other standards are normatively referenced
Informative References(Provided for Information)No other standards are informatively referenced
Descriptors Antoine equation, Clausius-Clapeyron equation, Enthalpy of sublimation, Enthalpy of vaporization, Haggenmacher equation, Heat of sublimation, Heat of vaporization, Vapor pressure
ICS27.040
PublisherASTM
FormatA4
DeliveryYes
Pages4
File Size81 KB
Price£36.00


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