At 100^oC,the Vapor Pressure of Nitric Acid Is 26 $\Delta$ _vapH)of Nitric Acid

At 10.0^oC,the vapor pressure of nitric acid is 26.6 mmHg,and at 50.0^oC,the vapor pressure is 208 mmHg.Using this information,calculate the heat of vaporization ( $\Delta$ _vapH) of nitric acid.(R = 8.314 J/K.mol)

A) 25.6 kJ/mol
B) 39.1 kJ/mol
C) 48.4 kJ/mol
D) 225 kJ/mol
E) 566 kJ/mol