Question

1. a student performed a fractional distillation of a mixture of two straight - chain hydrocarbons, ( c_7h_{16} ) and ( c_8h_{18} ). using four clean, dry flasks, the student collected the distillate over the volume ranges (a, b, c, and d) shown in the graph above. over what volume range should the student collect the distillate of the compound with the stronger intermolecular forces? (a) a (b) b (c) c (d) d

Explanation:

Step1: Understand the relationship between intermolecular forces and boiling point

Stronger intermolecular forces lead to a higher boiling point.

Step2: Analyze the distillation graph

In a distillation, lower - boiling point substances distill first. The compound with stronger intermolecular forces has a higher boiling point. Looking at the graph, the later - distilling (higher - temperature) portion corresponds to the compound with stronger intermolecular forces.

Answer:

C. C