Burning is an oxydation reaction.
Of course, it is a chemical change.
Yes, burning gas on the stove is an example of an exergonic reaction. It releases energy in the form of heat and light as it converts the chemical energy stored in the gas molecules into thermal energy.
By burning natural gas in a combustion engine, you get mechanical energy.
You'll probably smell that burning smell if your gas is burning right, try putting about a cup of sugar into your gas tank as a catalyst.WRONG!! Do not put sugar in your gas tank! This will likely ruin your engine!!
Burning of any hydrocarbons such as natural gas or oils
Neither, the process of burning gas (which stores chemical energy) releases that energy as "HEAT" energy. This heat energy is then converted into mechanical energy.
If your car is running when parked then it is burning gas. Cars use gasoline to run the engine.
If the engine is running it is burning fuel, whether the gas pedal is pressed or not.
To prevent gas burning you must either stop it from mixing with oxygen or avoid it becoming heated (by a spark for example) All fires require fuel, oxgyen and a source of heat. To put out a burning gas usually the technique is simply to cut off supply of the gas by disconnecting the supply.
A spark ignition engine, like your average gasoline/petrol burning car engine.
It can burn a little smokey but that really wont hurt your motor. If you are worried about burning old gas just get an octain booster and add it to the tank of gas.
If you have been revving it a lot, that may be the problem. If you put too much gas into the engine without burning it up, it sits in the engine and floods it.