Answer to Question #151936 in Physical Chemistry for Trix Wu

Question

How's the melting point of alkynes? Is is Increasing or decreasing?

Answer 1

The melting point of Alkynes increases with increase in the number of carbon atoms present in the molecules. Also, it increases with number of triple bonds present, that is

Alkyne< Diyne< Triyne< Polyne

However, for isomeric Alkynes, the melting point decreases with increase in branching of the molecular structure.