A carregar...
Publicação
Viscosity of Compressed Liquid 1,1,1-Trifluoroethane (HFC-143a) and Pentafluoroethane (HFC-125)
| Nome: | Descrição: | Tamanho: | Formato: | |
|---|---|---|---|---|
| 80.71 KB | Adobe PDF |
Orientador(es)
Resumo(s)
The viscosity of compressed liquid 1,1,1-trifluoroethane (HFC-143a) and pentafluoroethane (HFC-125) has been
measured with a vibrating-wire viscometer at five temperatures between (254 and 293) K. The measurements were performed at pressures from above saturation up to 10 MPa, although for the isotherms at about 254 K the
maximum pressure was approximately 5 MPa for HFC-143a and 7.4 MPa for HFC-125. For the isotherm at about 263 K, the highest pressure for HFC-143a was of the order of 7.5 MPa. The overall uncertainty of these
results has been estimated to be less than ( 1.0 %. The measurements have been correlated using a scheme based on a hard-spheres model. The root mean square deviation of the experimental results from the correlations for HFC-143a and HFC-125 is ( 0.24 % and ( 0.25 %, respectively. The correlation scheme has been used to perform the small extrapolations of the present data to the saturation line to enable comparison with literature results at saturation pressure.
Descrição
Palavras-chave
Viscosity
Contexto Educativo
Citação
Avelino, Helena M. N. T.; Fareleira, João M. N. A., Oliveira, Carla Padrel de - Viscosity of Compressed Liquid 1,1,1-Trifluoroethane (HFC-143a) and Pentafluoroethane (HFC-125). "Journal of Chemical and Engineering Data". [Em linha]. ISSN 0021-9568 (Print) 1520-5134 (Online). Vol. 51, nº 5 (2006), p. 1672-1677
Editora
American Chemical Society