Why doesn't #CO_2# melt if you leave it out in the open?

1 Answer
Feb 26, 2016

Answer:

When a solid mets into liquid, some of the intermolecular forces break, and when most of them break the liquid turns into gas.

Explanation:

#CO_2# is a non polar molecule and therefore, the only possible intermolecular interactions are London Dispersion Force (LDF) or also called Van der Waals forces which are considered weak forces, especially that #CO_2# is a small molecule.

When #CO_2# solid (dry ice) is heated (or left in the open air at #25^@C#), most of the intermolecular forces will break and #CO_2# molecules will be free and will become gaseous molecules.

Note that when a solid mets into liquid, some of the intermolecular forces break, and when most of them break the liquid turns into gas.