39 540 546 these equations are useful to determine

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: to yield (see the text above Eq. 5.119) RT 2 M A f m or DT f = K f m B , DT f = (5.119, 5.120) D fus H m B where Kf is called the cryoscopic constant of the solvent. 12 Boiling Point Elevation: By considering the liquid-vapor equilibrium in which the vapor contains only the component A, we can derive an expression analogous to that obtained above: RT 2 M A b DT b = m or DT b = K b m B (5.126) D vap H m B where Kb is called the ebullioscopic constant of the solvent. The elevation of boiling point is a rather weak effect compared to the depression of freezing point. Therefore, the latter property is overwhelmingly used for the practical applications of colligative properties. Practical Applications: Ÿ Problems 5.39, 5.40, 5.46 Ÿ These equations are useful to determine the freezing points or boiling points of various solutions...
View Full Document

This document was uploaded on 02/28/2014 for the course CHEM 311 at LA Tech.

Ask a homework question - tutors are online