The vapor pressure of a substance is measured over a range of temperatures. A plot of the natural log of the vapor pressure versus the inverse of the temperature (in kelvin) produces a straight line with a slope of-3.46 * 10³ K. Find the enthalpy of vaporization of the substance.

a) 2.40 * 10^-3 kJ/mol

b) 28.8 kJ/mol

c) 0.416 kJ/mol

d) 3.22 kJ/mol