Answer to Question #171575 in General Chemistry for Kenny

Question

Liquid substances that change their state but do not change their composition

Answer 1

The liquid substances which can change their state but do not change their composition is called the Azeotropic solution.

E.g: 95.63% solution of ethanol

It goes from liquid to vapour phase with out changing the composition of the solution. i.e the composition of liquid and the vapour phase are identical.