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the higher self ignition temperature of the petrol is due to the low density than the diesel.
as
density = pressure / (R* temperature)
R= universal gas constant.
ex. hydrogen (gas) has density = .082 at 300 k
while kerosene has =810
(both are in kg/m^3)
and auto ignition temperatures are
hydrogen =500
kreosene=295
similarly , petrol-density=737
diesel has=820 to 950 .
Wiki User
∙ 13y ago
Wiki User
∙ 11y agoPetrol (which is called gasoline in North America) has a much different composition than diesel. Petroleum-derived diesel is composed of about 75% saturated hydrocarbons (primarily paraffins including n-, iso-, and cycloparaffins), and 25% aromatic hydrocarbons (including naphthalenes and alkylbenzenes). The average chemical formula for common diesel fuel is C12H23, ranging approximately from C10H20 to C15H28. Overall, a typical gasoline is predominantly a mixture of paraffins (alkanes), naphthenes (cycloalkanes), and olefins (alkenes). The bulk of a typical gasoline consists of hydrocarbons with between four and 12 carbon atoms per molecule (commonly referred to as C4-C12). Comparing the two it should be clear that diesel tends to be made from heavier molecules, consequently it has a higher flash point. With that said, the exact flash point of any given liter of either fuel will vary because the composition varies depending on fuel grade, the composition of the raw oil it is made from and the processes used to distill, crack, reform and mix to produce the final fuel. In temperate climates the composition will vary based on the season because the fuels will be optimized for performance in hot and cold climates. Detergents, oxygenates, anti-knock agents, and dyes will also vary from refinery to refinery, company to company, and country to country.
Wiki User
∙ 12y agobecause of the mass
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A low boiling point one would be better as it will use less heat and release Co2 into the air. --------------------------------------------------------------------------------------------------------- Twitter @TrolPie
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Will a fuel with a higher boiling point be a better fuel than one with a lower boiling point?
A low boiling point one would be better as it will use less heat and release Co2 into the air. --------------------------------------------------------------------------------------------------------- Twitter @TrolPie
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Why might propan 1 ol not be used as a fuel?
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