molar volume

molar volume
   a unit used by chemists and physicists to measure the volumes of gases.
   The behavior of gases under ordinary conditions (not at very high pressures or very low temperatures) is governed by the Ideal Gas Law. This law says that the volume V of a gas is related to its temperature T and pressure P by the formula PV = nRT, where n is the number of moles of gas present and the gas constant R equals 8.314 joules per mole per kelvin. The molar volume is the volume one mole of gas occupies at standard temperature (273.16 kelvins, or 0 °C) and standard pressure (1 atmosphere, or 101.325 kilopascals). The molar volume is equal to 22.414 liters or 0.7915 cubic foot. (Occasionally the term "molar volume" is used for the volume occupied by a mole of a substance which is not a gas; in such cases the molar volume will be different for each substance.)

Dictionary of units of measurement. 2015.

Игры ⚽ Нужен реферат?

Look at other dictionaries:

  • Molar volume — The molar volume, symbol Vm,[1] 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… …   Wikipedia

  • molar volume — molio tūris statusas T sritis fizika atitikmenys: angl. gram molecular volume; molal volume; molar volume vok. Molvolumen, n rus. мольный объём, m; молярный объём, m pranc. volume molaire, m …   Fizikos terminų žodynas

  • molar volume — molio tūris statusas T sritis Standartizacija ir metrologija apibrėžtis Apibrėžtį žr. priede. priedas( ai) Grafinis formatas atitikmenys: angl. molar volume vok. molares Volumen, n; Molvolumen, n rus. молярный объем, m pranc. volume molaire, m …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

  • molar volume — molinis tūris statusas T sritis chemija apibrėžtis Medžiagos 1 molio užimamas tūris. atitikmenys: angl. molar volume rus. молярный объем …   Chemijos terminų aiškinamasis žodynas

  • molar volume — Chem. the volume occupied by one mole of a gas, liquid, or solid. Also called molal volume, mole volume. Cf. Avogadro s law. [1945 50] * * * …   Universalium

  • molar volume — Chem. the volume occupied by one mole of a gas, liquid, or solid. Also called molal volume, mole volume. Cf. Avogadro s law. [1945 50] …   Useful english dictionary

  • gas molar volume — dujų molio tūris statusas T sritis chemija apibrėžtis Dujų molio užimamas tūris 273,15 K temperatūroje ir 101,325 kPa slėgyje (gas molar volume 22,4 l). atitikmenys: angl. gas molar volume rus. мольный объем газа; молярный объем газа …   Chemijos terminų aiškinamasis žodynas

  • gas molar volume — dujų molio tūris statusas T sritis Standartizacija ir metrologija apibrėžtis Dujų molio užimamas tūris 273,15 K temperatūroje ir 101,325 kPa slėgyje (apie 22,4 l). atitikmenys: angl. gas molar volume vok. molares Gasvolumen, n rus. мольный объем… …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

  • gas molar volume — dujų molio tūris statusas T sritis fizika atitikmenys: angl. gas molar volume vok. molares Gasvolumen, n rus. мольный объём газа, m; молярный объём газа, m pranc. volume molaire de gaz, m …   Fizikos terminų žodynas

  • Volume fraction — Volume fractions phi i are useful alternatives to mole fractions x i when dealing with mixtures in which there is a large disparity between the sizes of the various kinds of molecules; e.g., polymer solutions. They provide a more appropriate way… …   Wikipedia

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”