You run a new experiment and you found that a 0.43 mole fraction of Naphthalene has a break at 39.8 ºC. In the same experiment, a 0.75 mole fraction of Naphthalene has a break at 69.5 ºC. Calculate the heat of fusion of Naphthalene in J/mol. Round your answer to the nearest unit.
A. Not applicable
B. Insufficient information
C. 43 J/mol
D. 90 J/mol