The molar volume, symbol Vm, is the volume occupied by one mole of a substance (chemical element or chemical compound) at a given temperature and pressure. It is equal to the molar mass (M) divided by the mass density (ρ). It has the SI unit cubic metres per mole (m3/mol), although it is more practical to use the units cubic decimetres per mole (dm3/mol) for gases and cubic centimetres per mole (cm3/mol) for liquids and solids.
The molar volume of a substance can be found by measuring its molar mass and density then applying the relation
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If the sample is a mixture containing N components, the molar volume is calculated using:
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For ideal gases, the molar volume is given by the ideal gas equation: this is a good approximation for many common gases at standard temperature and pressure. For crystalline solids, the molar volume can be measured by X-ray crystallography.
Read more about Molar Volume: Ideal Gases, Crystalline Solids, Molar Volume of Silicon
Other articles related to "molar volume, volume, molar":
... to be 101.325 kPa and 273.15 K, we can find the volume of one mole of a gas For 100.000 kPa and 273.15 K, the molar volume of an ideal gas is 22.414 dm3mol-1 ...
... This method defines the Avogadro constant as the ratio of the molar volume, Vm, to the atomic volume Vatom , where and n is the number of atoms per unit ... silicon has a cubic packing arrangement of 8 atoms, and the unit cell volume may be measured by determining a single unit cell parameter, the length of one of the sides of the cube, a ... uncertainty of 2.8×10−8, corresponding to a unit cell volume of 1.60193304(13)×10−28 m3 ...
... dependence of the equilibrium constant is associated with the reaction molar volume ... For reaction the reaction molar volume is where V denotes a partial molar volume of a reactant or a product ... pressure at constant temperature to be The matter is complicated as partial molar volume is itself dependent on pressure ...
... phase, the pressure dependence of the equilibrium constant is associated with the reaction molar volume ... For reaction the reaction molar volume is where denotes a partial molar volume of a reactant or a product ... to be The matter is complicated as partial molar volume is itself dependent on pressure ...
... routinely made for the electronics industry, and the measurement of the molar volume of silicon, both by X-ray crystallography and by the ratio of molar mass to mass density, has attracted ... The interest stems from the fact that accurate measurements of the unit cell volume, atomic weight and mass density of a pure crystalline solid provide a direct determination of the ... The 2006 CODATA recommended value for the molar volume of silicon is 12.058 8349(11)×10−6 m3/mol, with a relative standard uncertainty of 9.1×10−8 ...
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