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Thermodynamics of acrylic acid fromT =  5K toT =  330K

โœ Scribed by B.V. Lebedev; T.G. Kulagina; V.V. Veridusova

Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
168 KB
Volume
31
Category
Article
ISSN
0021-9614

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โœฆ Synopsis

The temperature dependence of the standard molar heat capacity C o p,m of a sample of acrylic acid (total mole fraction of impurities, x = 0.0011) has been studied in an adiabatic vacuum calorimeter at temperatures between T = 5 K and T = 330 K to within 0.2 per cent at T > 40 K. The temperature and enthalpy of melting of the compound have been measured. The data obtained were used to determine the temperature, enthalpy, and entropy of melting of pure acrylic acid and to calculate its thermodynamic functions and m in the range T โ†’ 0 to T = 330 K. From literature data on the standard enthalpy of formation and the absolute entropy estimated in the present work, the standard molar entropy of formation f S o m , and the standard molar Gibbs free energy of formation f G o m , and logarithm of the thermodynamic constant of the formation reaction lg K f of acrylic acid from the corresponding elements in their standard states at T = 298.15 K have been calculated.

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