Evaluation and Prediction of Latent Heat of Vaporization at Various Temperatures for Pure Components and Binary Mixtures

  The prediction of latent heat of vaporization of pure compounds has at least sixteen methods to predict the latent heat of vaporization for pure compounds and three methods to predict the latent heat of vaporization for binary mixtures .All these  methods has been  evaluated in this work.There are at least nine methods available in literature for prediction  of latent heat of vaporization at any temperature using either  vapor pressure data or the law of corresponding states .These methods  predict the latent heat of vaporization at various  temperatures directly. The accuracy of these methods are different. Some of these methods have accurate results when dealing with non polar compounds but not so accurate when dealing with polar compounds . Halim and Stiel is the best method among these nine  methods which is directly deal with polarity of compounds by introducing what is known polarity factor of polar compounds and it gives1.552 absolute average deviation percent compared with experimental data for 18 pure non polar compounds with 446 data points .On the other hand it gives  2.8476 AAD%  compared with experimental data for 6 polar compounds with 180 data points .The prediction of the latent heat of vaporization from normal boiling point