Draw the isomers of hexane. To move an automobile, there are a number of energy conversions. These conversions result in a loss of energy. The equation for the combustion of C25H52 . The energy given off by the formation of the products is greater than the energy needed to break the bonds in the hydrocarbons and the oxygen molecules.
Fuels provide energy as they burn.
Beyond Akanes Carbon is a versatile building-block atom. This type of hydrocarbon molecule is called an alkene. This can occur when four electrons are shared between the atoms. This double sharing of electrons is called a double covalent bond. Not all builder molecules are hydrocarbons.