a propane gas reacts with oxygen to produce carbon dioaxide and water is this heat energy or nucler energy
If it were an example of nuclear energy, some of the carbon, hydrogen or oxygen atoms participating in the reaction would change to a different element.
This does not happen in the reaction you describe.
The reaction you mentioned, where propane gas reacts with oxygen to produce carbon dioxide and water, is a chemical reaction, not a nuclear reaction. In this case, the energy involved is typically in the form of heat energy, as it is a combustion reaction.
To determine whether a reaction involves heat energy or nuclear energy, it's important to understand the nature of the reaction. In a chemical reaction, such as combustion or oxidation, atoms rearrange to form new molecules, releasing or absorbing energy in the process. This energy is usually in the form of heat.
On the other hand, a nuclear reaction involves changes in the nucleus of atoms, which leads to the release of nuclear energy. Nuclear reactions typically involve processes like nuclear fission (splitting of an atomic nucleus) or nuclear fusion (combining atomic nuclei). These reactions release much more energy compared to chemical reactions.
The reaction you described, propane + oxygen → carbon dioxide + water, involves the breaking and formation of chemical bonds, resulting in the release of heat energy.