Answer to Question #149114 in General Chemistry for Aisha

Question

Why is an evaporating dish filled with ice placed on a covered beaker during sublimation

Answer 1

Because a vacuum has no pressure, the substance, with a few other factors, can reach this vapor pressure almost instantly and skip the liquid phase. Ice is filled in the evaporating dish.

The ice serves as a cooling agent, which induces the pure product to form on the beaker during sublimation .