The chemical bonds in the substance are strong ones.
The amount of chemical energy a substance has is determined by the types and arrangement of atoms and molecules in that substance. The energy is stored within the chemical bonds between these atoms and molecules. The strength of these bonds and the potential energy stored in them determine the amount of chemical energy.
This physical phenomenon (a change of phase) is called melting; during melting the chemical nature of molecules is not changed but the bonds between molecules are weakened.
chemical bonds
A molecule is not an unique entity. It is common to any substance. Any no. of atom which combine together by chemical bonds form a molecule. The melting point of any molecule depends upon its chemical composition.
Usually, no chemical bonds are broken in a melting process. This generalization is probably true for most if not all candles.
For example are affected the melting point, boiling point, density, reactivity, etc.
A chemical molecule
When energy is provided to any substance and its bonds are loosened, it starts melting.
The substance is a compound, which forms chemical bonds that cannot be physically separated, but only by a chemical change.
Chemical change or chemical reaction describes how a substance can form a new substance.
A melting point is a periodic property. Melting point is basically the amount of energy required to break chemical bonds. The more energy required, the stronger the bonds and the higher the melting point. For example, Since Ionic bonds have a transfer of electrons, it requires a lot of energy to break the bonds and has a higher melting point.
The chemical bonds in the original substances are broken down, and new chemical bonds are formed with the other substance.