system
Given the following post, respond as if you're commenting on Reddit:
human
Is there a theoretical limit to the melting point of a material?
gpt
Certainly.

Temperature is a measure of the average kinetic energy of the molecules in a material. Which also means that temperature is a measure of the average available energy for reactions, in the form of molecular kinetic energy. Depending on the structure of a molecule it may be possible that it would take less energy to cause it to break down than it would take to bring it to a hypothetical melting point. There are actually lots of materials like this, especially depending on the ambient environment. For example, cellulose doesn't really melt, it just burns when you get it hot enough.

At a more extreme end, there are atomic limits to the melting point of materials. At certain temperatures you gain enough free energy to begin ionizing molecules and atoms, and at that point solid versus liquid becomes somewhat moot. This corresponds to around 46000 Kelvin at the low end.