USA: +1 (725) 712-1730 
Sign in
Fractional distillation is used to separate the components of a 50:50 mixture of heptane (C7H16) and octane (C8H18). A distillation graph shows the temperature in °C (y-axis) versus volume of distillate (x-axis) for the process. Match each label with its corresponding target and answer the question below.
Expert Answer
Answer
The boiling point of heptane is 98.42 °C
The boiling point of octane is 125 °C
With increase in the molecular weight, the boiling point increases. Heptane (7 C atoms) has lower molecular weight than octane (8 C atoms). Hence, heptane has lower boiling point than octane.
