Convert the calculated mole fraction of naphthalene dissolved in toluene from Example 7.10 into...

(a) Convert the calculated mole fraction of naphthalene dissolved in toluene from Example 7.10 into molarity, assuming that the volumes are strictly additive. The density of toluene is 0.866 g/mL and the density of naphthalene is 1.025 g/mL. (b) Estimate the solubility, in g/100 mL and molarity, of naphthalene in n-decane, C₁₀H₂₂, which has a density of 0.730 g/mL.

Example 7.10

Calculate the solubility of solid naphthalene, C₁₀H₈, in liquid toluene, C₆H₅CH₃, at 25.0째C if the enthalpy of fusion of naphthalene is 19.123 kJ/mol and its melting point is 78.2째C.