At 10.0oC, the vapor pressure of nitric acid is 26.6 mmHg, and at 50.0oC, the vapor pressure is 208 mmHg. Using this information, calculate the heat of vaporization (?Hvap) of nitric acid.
a. 25.6 kJ/mol
b. 39.1 kJ/mol
c. 48.4 kJ/mol
d. 225 kJ/mol
e. 566 kJ/mol
Answer: B