1. The problem statement, all variables and given/known data slope: -8.000 x 10^3 K The graph is of ln vapor pressure of a gas vs. invert kelvin temperature Using the Clausius Clapeyron equation, find Hvap (heat of vaporization) 2. Relevant equations Clausius Clapeyron equation: ln P= (-delta Hvap/R)*(1/T) + C 3. The attempt at a solution I tried using the given slope in the equation as T. Then I tried using y=mb. I multiplied the slope by 100K thinking I could find lnP.