Symbol of molar volume of gas

The symbol of molar volume of gas is Vm.

1, the definition of molar volume of gas:

The molar volume of gas refers to the volume of a certain gas in a unit substance, and its symbol is Vm, and the unit is L/mol (liter/mole). Under standard conditions (0℃, 10 1.33kPa), the volume of any ideal gas 1 mol is about 22.4 liters, that is, Vm=22.4L/mol. At 25℃,1.01×105pa, the molar volume of gas is about 24.5L/mol.

2. Gas molar volume formula:

The calculation formula of gas molar volume is: n=V/Vm. Where n is the amount of substance (unit mole), V is the volume of substance (unit liter), and Vm is the molar volume (unit liter/mole).

3, the definition of gas volume:

Gas volume refers to the volume of the whole space that a large number of gas molecules can reach. Under standard conditions, the volume of 1 mole of any ideal gas is about 22.4 liters.

However, under non-standard conditions, the gas volume will be different because of the change of gas pressure and temperature. In order to describe the volume of gas more accurately, scientists have developed a universal unit-cubic meter (m? ), this unit can be used to represent the volume of any gas.

Characteristics of gas volume:

1, microscopic characteristics of volume:

Gas volume is the space occupied by a large number of gas molecules, and its size depends on the number of gas molecules, the distance between molecules and the arrangement of molecules.

2. The uncertainty of volume:

Because the distance between gas molecules is much larger than the size of the molecules themselves, the gas volume is uncertain. Under the same conditions, different results may be obtained by measuring the gas volume many times.

3. The relationship between volume and temperature and pressure:

Gas volume is closely related to temperature and pressure. At a certain temperature and pressure, the volume of gas depends on the kind and concentration of gas.

4, the difference between ideal gas and actual gas:

Ideally, gas molecules can move freely and occupy as much space as possible without interaction. However, in the actual situation, there is a weak interaction between gas molecules, which limits the gas volume and has certain stability.