Several literature relations proposed by Vetere are re-examined to simplify their analytical form and to improve their performances. Their results are compared with those of three old literature equations, namely the equations by Riedel, Chen and Liu. On the whole, four of them embody universal parameters, which can be used for any type of compounds and require Tb and the critical constants Tc and Pc in order to be applied. Regarding the other ones, three are function of Tb and molecular weight M, and the last three need as input parameters M and the polar parameter Wp .The parameters of the equation which disregard the use of the critical constants must be optimised separately for three classes of compounds, namely hydrocarbons, polar compounds and alcohols. Further, to have a severe test, nearly 290 experimental data of ΔHvb were processed, chosen from the most reliable reported in the fifth edition of The Properties of Gases and Liquids.

Evaluation of several literature equations to predict the vaporization enthalpies at the normal boiling point.

KIKIC, IRENEO;
2011-01-01

Abstract

Several literature relations proposed by Vetere are re-examined to simplify their analytical form and to improve their performances. Their results are compared with those of three old literature equations, namely the equations by Riedel, Chen and Liu. On the whole, four of them embody universal parameters, which can be used for any type of compounds and require Tb and the critical constants Tc and Pc in order to be applied. Regarding the other ones, three are function of Tb and molecular weight M, and the last three need as input parameters M and the polar parameter Wp .The parameters of the equation which disregard the use of the critical constants must be optimised separately for three classes of compounds, namely hydrocarbons, polar compounds and alcohols. Further, to have a severe test, nearly 290 experimental data of ΔHvb were processed, chosen from the most reliable reported in the fifth edition of The Properties of Gases and Liquids.
File in questo prodotto:
Non ci sono file associati a questo prodotto.
Pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11368/2439321
 Avviso

Registrazione in corso di verifica.
La registrazione di questo prodotto non è ancora stata validata in ArTS.

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact