There seems to be a misunderstanding. "Prophane" is not a chemical term. It's likely a misspelling of "propane", which is a hydrocarbon with the chemical formula C3H8.

The word equation for propane combustion is:

Propane + Oxygen → Carbon Dioxide + Water + Energy

This equation describes the reaction of propane (C3H8) with oxygen (O2) to produce carbon dioxide (CO2), water (H2O), and energy in the form of heat and light.