Heidolph Basis Hei VAP ML Advantage Rotary Evaporator 24 19. (a) Use Trouton's rule, Delta Hvap^circ approx (88 Entropy of vaporisation is given by the formula, \Delta S_{\text {vap. }}.. Finding Delta H using ln P vs 1 T (Hvap Lab)
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delta vap h Standard enthalpy of vaporisation \Delta _ { v a p } H ^ { \circ } for a