Room temperature red changes to white gradually when heated

Quick answer：

This description is commonly associated with certain chemical reactions, such as the thermal decomposition of certain red pigments that change color upon heating. In chemistry, the color change can be due to a variety of factors including chemical reactions, physical changes, or phase transitions. For example, iron oxide (rust) appears red at room temperature but turns to a brown powder when heated further. In physics, some materials exhibit color changes with temperature due to changes in their electronic states or crystal structures.