Why do we say a substance in a liquid phase is more disordered than the same substance in a solid phase?
Solution 40E A solid turns liquid on melting. When the solid is given excessive heat energy, its molecules start to move vigorously as their kinetic energy increases. This causes an increase in average separation of the solid atoms It eventually increases in volume and finally melts. In the molten state, the atoms of the material are far apart and hence they are free to move about the material with ease as they are loosely bound now as opposed to a solid where they are strongly bound. Therefore, the substance in a liquid phase becomes more disordered than its solid phase.