How do you find the average enthalpy using the slope of a graph?

Answer 1

If you are referring to the temperature dependence of the Keq, we have an equation that states...

ln K = -∆Hº/RT + ∆Sº/R

If you plot ln K on the y-axis and 1/T on the x- axis, you have slope = -∆Hº/R and since R is a constant, we can find ∆H from the slope of this line.