This, of course was a revolutionary perspective in its time; many, during these years, did not believe in the existence of either atoms or molecules (see: history of the molecule). According to these early views, and others such as those developed by William Thomson, if energy in the form of heat is added to a solid, so to make it into a liquid or a gas, a common depiction is that the ordering of the atoms and molecules becomes more random and chaotic with an increase in temperature:
This, of course, was a groundbreaking viewpoint at that time; many during these years did not accept the concept of atoms or molecules (see: history of the molecule). According to these early perspectives and others like those developed by William Thomson, when heat energy is added to a solid, it transforms into a liquid or gas. A common depiction is that the arrangement of atoms and molecules becomes more disordered and chaotic as temperature increases.