How do you calculate pressure when given volume mass and temperature?

Answer 1

On the assumption you are referring to gasses;

pV = nRT

where p = pressure, V = volume, n = number of moles of gas, R = universal gas constant, T = temperature in Kelvin.

You would have to convert mass into the number of moles of gas by dividing mass by the relative molecular mass of the gas.

Then, rearranging the above gives V = (nRT / p).

Answer 2

If you have mass and density, volume is simply

mass/density = volume

Most liquid are incompressible to a large degree so pressure is not a factor unless you are in extreme situations. If so then you will have to know the co-efficient of compression.

Liquids are susceptible to thermal expansion and you will have to know the co-efficient of thermal expansion.

Answer 3

Use the ideal gas law. PV = nRT, where P is pressure, V is volume, n is moles, R is the gas constant, and T is temperature in Kelvins. Since you have mass, you can find moles from mass by dividing the mass in grams of the gas by its molar mass, n = mass/M. To use this equation to calculate pressure, divide both sides by the volume.

PV = nRT

P/V = nRT/V

P = nRT/V

Answer 4

Use Ideal gas law to solve all gas problems, PV=nRT. In this case, PV/T.

Answer 5

You can't calculate volume of an unknown substance if you only know mass and temperature.