ASTM E2071-00(2005)
Historical Standard: ASTM E2071-00(2005) Standard Practice for Calculating Heat of Vaporization or Sublimation from Vapor Pressure Data
SUPERSEDED (see Active link, below)
ASTM E2071
1. Scope
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 1This 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 SI values are standard.
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.
1.3 There is no ISO standard equivalent to this practice.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
ASTM Standards
D2879 Test Method for Vapor Pressure-Temperature Relationship and Initial Decomposition Temperature of Liquids by Isoteniscope
E1142 Terminology Relating to Thermophysical Properties
E1194 Test Method for Vapor Pressure
E1719 Test Method for Vapor Pressure of Liquids by Ebulliometry
E1782 Test Method for Determining Vapor Pressure by Thermal Analysis
Keywords
Antoine equation; Clausius-Clapeyron equation; enthalpy of sublimation; enthalpy of vaporization; Haggenmacher equation; heat of sublimation; heat of vaporization; vapor pressure; Antoine equation; Clausius-Clapeyron equation; Enthalpy of vaporization/sublimation; Haggenmacher equation; Heat of vaporization/sublimation; Sublimation; Vapor pressure (VP x );
ICS Code
ICS Number Code 27.040 (Gas and steam turbines. Steam engines)
DOI: 10.1520/E2071-00R05
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