molar volume


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molar volume,

the volume occupied by a molemole,
in chemistry, a quantity of particles of any type equal to Avogadro's number, or 6.02×1023 particles. One gram-molecular weight of any molecular substance contains exactly one mole of molecules.
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 of a substance at STPSTP
or standard temperature and pressure,
standard conditions for measurement of the properties of matter. The standard temperature is the freezing point of pure water, 0°C; or 273.15°K;.
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. According to Avogadro's law, at a given temperature and pressure a given volume of any gas contains the same number of molecules. At STP 1 mole of gas occupies 22.414 liters. This volume is what is usually meant by the molar volume, although one can also speak of molar volumes of substances that are not gaseous at STP. Since at STP water occupies very nearly 1 cc per gram, and since 1 mole of water molecules weighs very nearly 18 grams, the molar volume of water is about 18 cc. The molar volume of osmium, one of the densest metals, is only about 8.4 cc; that of beryllium is only about 4.86 cc.

molar volume

[′mō·lər ′väl·yəm]
(physical chemistry)
The volume occupied by one mole of a substance in the form of a solid, liquid, or gas. Also known as molal volume; mole volume.
References in periodicals archive ?
Esteso, Effect of Temperature on the Partial molar Volume, Isentropic Compressibility and Viscosity of DL-2-aminobutyric acid in Water and in Aqueous Sodium Chloride Solutions, doi:10.1016/j.jct.2016.09.040, J.
In addition to information obtained, Type I inclusions indicate a different salinity between 4.1 and 4.9 wt % NaCl equiv., a density between 0.82 and 0.93g/cc, a molar volume between 20.7 and 23.4cc/mol and molar fraction of CO from 0.029 to 0.039 and of N[a.sup.+]from=0.013-0.015.
Where [G.sub.ij] = ([[partial derivative].sup.2] [bar.[DELTA][G.sub.m]]/[partial derivative][[phi].sub.i][partial derivative] [[phi].sub.j]])[v.sub.ref]: [v.sub.ref] is the molar volume of the reference component ([v.sub.1] in our case) and i,j = 2,3.
Density and molar volume. The density measurement is an important tool to detect the structural changes in the glass network (Soliman, 2008; Mansour et al., 2001).
The molar volume V = M/[rho] is therefore also linear with the temperature (because b [much less than] a).
where R = 8.314 J/(K x mol) is the universal gas constant [10]; [V.sub.M2] is the molar volume of plasma products in the local zone of EE in the air of the conductor being studied, caused by the action of the HPC on it.
where R is the molar gas constant and [v.sub.w] is the molar volume of the condensed phase (water or ice in this work).
Density and Molar Volume. Density ([rho]) of the fabricated glass samples is determined by applying Archimedes principle at room temperature through (1) while molar volume ([V.sub.m]) values are calculated and obtained by substituting obtained density values into (2).
where [V.sup.0.sub.[phi]] and M are the partial molar volume and molar mass of the solute, respectively.
Where [T.sub.m,blend] and [T.sub.m.sup.0] are the equilibrium melting points of the blend and the crystallizable component in the pure state; R is the gas constant; [DELTA]H is the heat of fusion per mole of repeat unit; 1/ is the molar volume of the respective component; [[phi].sub.2] is the volume fraction of component 2 in the blends; and [[CHI].sub.12] is interaction parameter of the blends.
Part 2: QSPR models for prediction of excess molar volume and liquid density using neural networks.