How do you mesure petrolium , by mass or volume?
If so how much amount is there in a barrel?

the wikipedia says
Oil barrel =42 US gallons =158.9873 litres
So the mesurement is from Volume
But doesn't the volume of a liquid expand according to the temperature?
If so shouldn't it be measured by mass rather than Volume?
If not so please explain

How do you mesure petrolium , by mass or volume?
If so how much amount is there in a barrel?

the wikipedia says
Oil barrel =42 US gallons =158.9873 litres
So the mesurement is from Volume
But doesn't the volume of a liquid expand according to the temperature?
If so shouldn't it be measured by mass rather than Volume?
If not so please explain

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The volume change of petrol in small quntity is not visible say for 100 lit. or 500 lit. But if the quntity is in thousands of tonnes, then the volume does increase with rise in temp. Thats why the serveyors use Tables contaning Volume against temperature data.

The volume change of petrol in small quntity is not visible say for 100 lit. or 500 lit. But if the quntity is in thousands of tonnes, then the volume does increase with rise in temp. Thats why the serveyors use Tables contaning Volume against temperature data.

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As far as i know
1 barrel = 210 liters.
i gallon = 5 liters.

As far as i know
1 barrel = 210 liters.
i gallon = 5 liters.

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