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Which is heavier an equal volume of water or gasoline?In: Science, Physics [Recategorize] |
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Weight of Water Compared to Weight of Gasoline
At 293 Kelvin (SI for temperature 20 degrees C or 60 degrees Fahrenheit), a gallon of pure water weighs 8.34 pounds, whereas a gallon of vehicular gasoline weighs about 6.15 pounds at that temperature.
Diesel weighs about 7.1 pounds per gallon.
But actually the question is not about weight, but about density, that is weight per volume.
The SI-Unit of density is kilogram per cubic metre, expressed as such, the densities are these:
Water: 998 kg/m3
Gasoline: 720 kg/m3
Diesel: 830 kg/m3
You see this when gasoline and water are put into a glass: because the mix badly and the density of gasoline is lower, it will stay at the top. (Be careful when doing this, gasoline vapor is explosive and toxic!)
As stated above, these values are temperature dependent, that is the reason why for example warm water in the sea rises (its density is lower than the density of cold water) and causes the currents which are so important for our lives.
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In the bathyscaphe Trieste, a research submarine designed to go to the deepest point of the Pacific Ocean, the bathyscaphe was filled with gasoline, which was buoyant in the ocean water. It carried steel shot as ballast to make it sink, and the gasoline provided the "lift", similar to a balloon in the air.
First answer by ID0000000000. Last edit by Nutral. Contributor trust: 0 [recommend contributor]. Question popularity: 278 [recommend question]
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