is burning gasoline in car exothermic? why? how?

Question

when burning gasoline what happens to the gas and why is it exothermic?

Answer 1

the gas from gasoline combustion is release from the engine and goes everywhere exhaust, through the gap in the bonnet.
Combustion is exothermic because the bonds formed in the product has more energy than the energy it took to break the bonds in the reactants.
I hope this helped

Answer 2

I always like to think of exothermic as heat EXITS the reaction. Whereas in endothermic heat ENTERS the reaction. Notice the 'ex' on the front of exothermic and exit. Any chemical reaction that gets hot is exothermic because it is the release of heat that makes it hot. Gasoline is a hydrocarbon, meaning it contains hydrogen, and carbon. CH4, methane, is the simplest of hydrocarbons. When gasoline is burned the hydrogen and carbon combine with oxygen from the air to form carbon-dioxide(CO2) and water vapor(H2O). The energy release comes from the electrons of the atoms(hydrogen, carbon, oxygen) going to a lower energy state(loosing energy) when they are combined to form the compounds(CO2 and H2O).

Answer 3

The petrol is turned into carbon dioxide and water with abundant oxygen (complete combustion), or carbon monoxide, carbon, and water when oxygen is limited (incomplete combustion).

We'll assume it's octane.

2C8H18 + 25O2 --> 16CO2 + 18H2O

Or, with incomplete combustion:

C8H18 + 8O2 --> 7CO + C + 9H2O

The reaction is an exothermic reaction, as it gives off heat and the products have less energy than the reactants.

Answer 4

Exothermic means that heat is released.