fire energy
Yes, an energy transformation is occurring only at point 3. At point 3, the energy of an object is changing as it moves or undergoes some kind of transformation. This can be due to a change in potential energy, kinetic energy, or thermal energy at that specific location.
The reactants of burning gasoline are gasoline (hydrocarbon fuel) and oxygen. The products of burning gasoline are carbon dioxide, water vapor, and heat energy.
The mechanical energy from the engine (with help from electrical energy from the battery), turns the potiential energy of gasoline/petrol into kinetic energy.
In a gasoline engine, chemical energy from burning gasoline is converted into mechanical energy as the engine's pistons move up and down. This mechanical energy is then used to power the vehicle and overcome friction and other forces.
Chemical energy is converted into mechanical energy.
Burning a match represents a chemical energy transformation. The potential energy stored in the match's chemical bonds is converted into thermal energy, light, and sound energy when it is burned.
Energy transformation has occurred.
In a coal burning power plant, the first energy transformation that occurs is the chemical energy stored in the coal being converted into thermal energy through combustion. This thermal energy is then used to produce steam, which drives turbines to generate electricity.
Energy transformation has occurred.
Burning a campfire is a transformation of chemical energy stored in the wood into heat and light energy, as well as some sound energy. The chemical energy is released through a combustion reaction as the wood undergoes oxidation with the oxygen in the air.
A log burning in a fire place.