Calculate the heat of vaporization of carbon tetrachloride given that the standard molar enthalpy of formation of liquid carbon tetrachloride is -135.4 kj/mol and the standard molar enthalpy of formation of gaseous carbon tetrachloride is -102.9 kj/mol.
a. +102.9 kj/mol
b. -32.5 kj/mol
c. +238.3 kj/mol
d. +32.5 kj/mol
e. -238.3 kj/mol

why is the answer d? for any