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The '''molar volume''', symbol ''V''<sub>m</sub>,<ref name="GreenBook">{{GreenBookRef2nd|page=41}}</ref> is the [[volume]] occupied by one [[mole (unit)|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 metre]]s per mole (m<sup>3</sup>/mol),<ref name="GreenBook"/> although it is more practical to use the units [[cubic decimetre]]s per mole (dm<sup>3</sup>/mol) for [[gas]]es and [[cubic centimetre]]s per mole (cm<sup>3</sup>/mol) for [[liquid]]s and [[solid]]s.
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The molar volume of a substance can be found by measuring its molar mass and density then applying the relation
::<math>V_{\rm m} = {M\over\rho}</math>.
If the sample is a [[mixture]] containing ''N'' components, the molar volume is calculated using:
::<math>V_{\rm m} = \frac{\displaystyle\sum_{i=1}^{N}x_{i}M_{i}}{\rho_{\mathrm{mixture}}}</math>.
For [[ideal gas]]es, 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 [[Crystal|crystalline solids]], the molar volume can be measured by [[X-ray crystallography]].
 
== Ideal gases ==
The ideal gas equation can be rearranged to give an expression for the molar volume of an ideal gas:
::<math>V_{\rm m} = {V\over{n}} = {{RT}\over{P}}</math>.
Hence, for a given temperature and pressure, the molar volume is the same for all ideal gases and is known to the same precision as the [[gas constant]]: ''R''&nbsp;= 8.314&nbsp;4621(75)&nbsp;J&nbsp;mol<sup>−1</sup>&nbsp;K<sup>−1</sup>, that is a [[Standard uncertainty|relative standard uncertainty]] of 9.1×10<sup>−7</sup>, according to the 2010 [[CODATA]] recommended value.<ref>{{cite web | title = CODATA value: molar gas constant | url = http://physics.nist.gov/cgi-bin/cuu/Value?r | publisher = NIST | accessdate = 2011-10-26}}</ref> The molar volume of an ideal gas at 100&nbsp;[[Pascal (unit)|kPa]] (1&nbsp;[[bar (unit)|bar]]) is
:22.710&nbsp;980(38)&nbsp;dm<sup>3</sup>/mol at 0&nbsp;°C
:24.789&nbsp;598(42)&nbsp;dm<sup>3</sup>/mol at 25&nbsp;°C
The molar volume of an ideal gas at 1 atmosphere of pressure is
:22.414 L/mol at 0&nbsp;°C
:24.465 L/mol at 25&nbsp;°C
 
== Crystalline solids ==
The [[unit cell]] volume (''V''<sub>cell</sub>) may be calculated from the [[unit cell parameter]]s, whose determination is the first step in an X-ray crystallography experiment (the calculation is performed automatically by the structure determination software). This is related to the molar volume by
::<math>V_{\rm m} = {{N_{\rm A}V_{\rm cell}}\over{Z}}</math>
where ''N''<sub>A</sub> is the [[Avogadro constant]] and ''Z'' is the number of formula units in the unit cell. The result is normally reported as the "crystallographic density".
 
=== Molar volume of silicon ===
[[silicon]] are 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 much attention since the pioneering work at [[NIST]] by Deslattes ''et al.'' (1974).<ref>{{cite journal | last = Deslattes | first = R. D. | coauthors = Henins, A.; Bowman, H. A.; Schoonover, R. M.; Carroll, C. L.; Barnes, I. L.; Machlan, L. A.; Moore, L. J.; Shields, W. R. | year = 1974 | journal = [[Physical Review Letters|Phys. Rev. Lett.]] | volume = 33 | issue = 8 | pages = 463–66
  | doi = 10.1103/PhysRevLett.33.463
| title = Determination of the Avogadro Constant | bibcode=1974PhRvL..33..463D}}</ref> 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 Avogadro constant.<ref name="CODATA98">{{CODATA1998}}</ref> At present (2006 CODATA recommended value), the precision of the value of the Avogadro constant is limited by the uncertainty in the value of the [[Planck constant]] (relative standard uncertainty of 5×10<sup>−8</sup>).<ref name="CODATA98"/><ref name="CODATA2006">{{CODATA2006}}</ref>
 
The 2006 CODATA recommended value for the molar volume of silicon is 12.058&nbsp;8349(11)×10<sup>−6</sup>&nbsp;m<sup>3</sup>/mol, with a relative standard uncertainty of 9.1×10<sup>−8</sup>.<ref name="CODATA2006" />
 
== References ==
{{reflist}}
 
==See also==
Interactive table of molar volumes at http://www.webelements.com/periodicity/molar_volume/
*[[specific volume]]
[[Category:Molar quantities]]
[[Category:Physical quantities]]
[[Category:Volume]]

Revision as of 11:56, 1 March 2014

Several of the more common ones are highlighted here. i) Tea Tree Oil- Another natural home remedy to cure the disease is with the use of oil from the tea tree. Sex with an infected partner is best avoided but if unavoidable, it would be prudent to use a condom for protection. Even though Diflucan has been known to be a treatment that remedies yeast infection it can also interrupt the embyonic formation. Sexual intercourse can worsen a vaginal yeast infection.

Patients with allergies should alter their doctors before taking this medication. Loose fitting clothes will ensure things don't get to congested and damp down there, those are the idea conditions for yeast growth. Yeast Infection is a kind of fungal infection caused by the Candida Albicans fungus. Treating candidiasis can be a challenging process to those who find themselves worried with regards to wellness. A surprising number of women are allergic to conventional medicine, whether it be for a vaginal yeast infection or some other ailment.

Itching, burning, swelling, pain, a rash and discharge to name a few. Did you know that it has been estimated that up to 80 million Americans may suffer from yeast-related problems. This is the most common and simplest way desired to be carried out in gaining pregnant. This is mainly due to inflammation of vagina and vulva however some other medical conditions also give rise to similar symptoms. There are in fact, alternative, cheap, safe, natural and holistic health practices and methods necessary to permanently eliminate the symptoms of this disease and cure the root internal cause of yeast infection regardless of its type, location, or level of severity.

Yeast is a fungus called Candida Albicans and is present in and on your body. If you have these nasty invaders on your computer, you may wondering how to get rid of them. A woman's body goes through a number of changes during pregnancy. I am an article writter for a variety of well being issues, i like speaking, browsing and writing about wellness, so i could assist people to be more aware of their wellness. General Differences For a start, yeast infection is an overgrowth a 'friendly' bacteria called Candida Albicans which part of the ecology of the genital area.

There are some exceptions though, you'll want to add some of these foods which will help kill off yeast. It will cure the eye wrinkles and the under eye dark circles. Even women who are yeast infection experts can sometimes mistake one for Vaginitis so consult with your physician if you think you may have it. Should you end up checking out the website you may be stunned to see all the individuals who have been helped with this program, many of these individuals even submitted testimonials. Yogurt yeast infection which is heat treated will not yield any wonders as it will kill the bacteria.

When you cherished this article along with you desire to acquire guidance with regards to how to treat a yeast infection at home kindly visit our web-page.