The Smell of Fresh-Cut Pine Is Due in Part to a Cyclic

The smell of fresh-cut pine is due in part to a cyclic alkene called pinene.A graph of the natural logarithm of the vapor pressure of pinene vs.1/temperature produces a straight line with a slope of -4936.37 K.What is the enthalpy of vaporization of pinene?

A) (+397 kJ/mol)
B) (-39.7 kJ/mol)
C) (+39.7 kJ/mol)
D) (-41.0 kJ/mol)
E) (+41.0 kJ/mol)