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Octane and octene are common chemicals in the chemical industry, and they play important roles in many industries and daily life. So, what is the difference between octane and octene? Octane is a straight chain alkane with the chemical formula C8H18. It is a colorless and odorless liquid that is flammable at room temperature. Octene, on the other hand, is a straight chain olefin with the chemical formula C8H16. It is a colorless gas that is also flammable at room temperature. From the chemical formula, it can be seen that the difference between octane and octene lies in whether there is a double bond in the molecule. octane is a saturated hydrocarbon without a double bond, while octene is an unsaturated hydrocarbon with a double bond. The difference between octane and octene can also be compared in terms of physical properties. Octane is in liquid state, while octene is in gas state, with different requirements for processing and storage. 

In addition, due to the presence of double bonds in octene, it is more prone to chemical reactions than octane, so its uses in the chemical industry are also different. 

Octane is mainly used as an anti knock agent for fuel, and its octane number is an important indicator for evaluating the anti knock performance of gasoline. The higher the octane number, the better the anti knock performance of gasoline, so octane plays a crucial role in gasoline production. 

Octene is mainly used to synthesize other organic compounds, such as advanced acids, alcohols, and polyesters. Due to its strong activity, octene exhibits higher reactivity in synthesis reactions. In addition, octene can also be used as a lubricant additive and plastic plasticizer, and has an irreplaceable role in the chemical industry. 

Overall, although there is only one double bond difference in chemical structure between octane and octene, there are significant differences in physical properties and chemical applications. 

They play an irreplaceable role in fields such as petrochemicals, organic synthesis, and plastic industry, providing important support for human life and industrial production.