Pure Benzene, C₆H₆, Freezes at 5

Multiple Choice

Pure benzene, C₆H₆, freezes at 5.5° and boils at 80.1°C. What is the boiling point of a solution consisting of cyclohexane (C₆H₁₂) dissolved in benzene if the freezing point of this solution is 0.0°C? (For benzene, K_f = 5.12 °C/m, K_b = 2.53 °C/m; for cyclohexane, K_f = 20.0 °C/m, K_b = 2.79°C/m)

A) 82.8°C
B) 91.2°C
C) 80.9°C
D) 77.4°C
E) 83.1°C