Question 24 of 32beginner💡 UnderstandShort Answer1 mark
What effect does branching of an alkane chain has on its boiling point?
Correct Answer
Branching of an alkane chain decreases its boiling point. With an increase in the number of branched chains, the molecule attains the shape of a sphere, which results in a smaller area of contact. This leads to weak intermolecular forces that are overcome at relatively lower temperatures.
Exercise: EXERCISES | Q: 9.15 | (Page Page 33)
For More Understanding
Explanation
As branching increases in an alkane, the molecule becomes more spherical in shape. This spherical shape reduces the surface area of contact between molecules, thereby decreasing the intermolecular van der Waals forces. As a result, less heat energy is required to overcome these forces, causing the boiling point to decrease.