thermodynamics $\Delta \bar{h}_{vap}$ and $\Delta \bar{s}_{vap}$ from vapor pressure vs. temperature data Chemistry Stack Exchange Vapor Pressure 24 19. (a) Use Trouton's rule, Delta Hvap^circ approx (88 Solved Heat, q, is energy transferred between a system and Chegg.com For water vap H = 41 kJ mol^1 at 373 K and 1 bar pressure. Assuming that water vapour Sarthaks eConnect Largest Online Education Community