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How much time does petrol evaporate outside in the shadow

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Why does petrol evaporate at room temperature?

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T-NEZ eNotes educator | CERTIFIED EDUCATOR

All liquids can evaporate at room temperature. Petrol, or gasoline, evaporates faster than most liquids because of its weak intermolecular attractions. Petrol is a mixture of hydrocarbons with the main constituent being octane, C8H18. Octane is a non-polar molecule. The only intermolecular attractions it has are weak London dispersion forces. The molecules have a range of kinetic energies, and those with the most kinetic energy escape at the surface and enter the gas phase.