Question

How to decrease intermolecular space between substances????

Answer 1

By bringing the molecules of the substance closer by applying pressure and decreasing the temperature.On applying pressure the particles come closer together decreasing the molecular space. For e.g.: LPG is gas which is liquefied under high pressure,dry ice which is formed by compressing carbon dioxide under very high pressure. HOPE THIS HELPS YOU..... :)

Answer 2

by increasng pressure and decreasing temperature