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Topic: Molar volume


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In the News (Fri 19 Apr 19)

  
  Calculations Using Standard Molar Volume
Standard Molar Volume is the volume occupied by one mole of any gas at STP.
Conversely, the number of moles present in any volume of gas at STP can also be determined, and if the identity of the gas is known, this number of moles can be converted to a mass.
Standard molar volume is also useful for Density determinations at STP.
www.sciencegeek.net /Chemistry/taters/Unit5MolarVolume.htm   (289 words)

  
 [No title]
From the volume of the gas, the pressure, the temperature, and the mass of magnesium, the molar volume of magnesium is calculated.
Apparent molar heat capacities and apparent molar volumes were measured for all isomeric C3 to C5 alkanols in their dilute aqueous solutions at 298.15 K using a differential flow microcalorimeter in conjuntion with a vibrating-tube densimeter.
Molar volumes and molar heat capacities of the pure alkanols (except for 2-methyl-2-propanol and 2,2-dimethyl-1-propanol which are solid at 298.15 K) were determined using the same instrumentation.
www.lycos.com /info/molar-volume.html   (452 words)

  
 molar volume - HighBeam Encyclopedia   (Site not responding. Last check: 2007-11-03)
molar volume the volume occupied by a mole of a substance at STP.
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.
Molar and molecular contingencies and effects of punishment in a human self-control paradigm.
www.encyclopedia.com /doc/1E1-molarvol.html   (356 words)

  
 Molar volume
In chemistry, the molar volume of a substance is the volume of one mole of that substance.
The SI unit for molar volume is m
The molar volume is usually given for a solid substance at 298 K.
www.ebroadcast.com.au /lookup/encyclopedia/mo/Molar_volume.html   (102 words)

  
 DETERMINATION OF THE MOLAR VOLUME OF CARBON DIOXIDE
By making measurements on a sample of carbon dioxide, students are able to determine the molar volume of CO They are also introduced to the concept of buoyancy and its importance when massing objects whose masses are small compared to their volumes.
Because the volume of the balloon and gaseous contents is large compared to its mass, the mass of the displaced air, pushing against the balloon and buoying it up, is a significant fraction of the mass of the balloon and contents.
Determining the volume of the balloon by measuring the circumference is not practical.
www.woodrow.org /teachers/chemistry/institutes/1986/exp5.html   (971 words)

  
 The Molar Volume of a Gas   (Site not responding. Last check: 2007-11-03)
The molar volume of the gas resulting from magnesium dissolved in hydrochloric acid is determined by water displacement and conversion of data to standard conditions.
The molar volume is the volume occupied by one mole of gas.
The accepted value for molar volume of any gas at STP is 22.4 L. Compute the absolute difference between the accepted value and the average value obtained from these experimental data.
dwb.unl.edu /Chemistry/MicroScale/MScale15.html   (942 words)

  
 The Molar Volume of a Gas   (Site not responding. Last check: 2007-11-03)
The volume occupied by one mole of a gas is its molar volume,
One purpose of this experiment is to measure the molar volume of oxygen gas, and to compare the measured value to the value predicted by the ideal gas law.
The volume of the water displaced from flask B into beaker D is equal to the volume of oxygen produced.
wwwchem.csustan.edu /chem1102/molarvol.htm   (1159 words)

  
 Mixtures; Partial Molar Quantities; Ideal Solutions
It is the incremental volume obtained by adding a small amount of component i to the mixture while holding the temperature, pressure, and the number of moles of all the other components constant divided by the number of moles of component i.
The partial molar volume is not necessarily the same as the volume of one mole of the pure component.
The volumes given in Equations 7, 8a, and 8b are the partial molar volumes which we have already said are not necessarily equal to the molar volumes of the pure components.
www.chem.arizona.edu /~salzmanr/480a/480ants/mixpmqis/mixpmqis.html   (1250 words)

  
 General Chemistry Online: Glossary:
Molar absorptivities are sometimes written as absorption cross sections by expressing the concentration in units of mol/cm
The heat required to raise the temperature of one mole of a substance by 1°C is called the molar heat capacity of the substance.
O is 18.015 g (obtained by adding twice the molar mass of hydrogen to the molar mass of oxygen).
antoine.frostburg.edu /chem/senese/101/glossary/m.shtml   (1485 words)

  
 The Gaseous State
The volumes of all molecules of a gas are small compared to the space between molecules (A gas is mostly empty space).
The volume of a fixed quantity of gas maintained at constant temperature is inversely proportional to the pressure.
Molar Volume – the volume of one mole of gas at STP, 22.4 L. Because the particle size of gas molecules is so small compared to the space between them all gas samples containing equal numbers of particles at similar conditions will occupy the same volume.
www.nmc.edu /~bberthelsen/c9n03.htm   (866 words)

  
 Molar Menu
Bicuspid invisalign district of columbia or Pre Molar Transitional teeth behind the half the tongue.
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www.coastalmanagementweb.com /menu/molar.htm   (567 words)

  
 Molar - Wikipedia, the free encyclopedia
Molar (tooth), the fourth kind of tooth in mammals.
El Molar, Tarragona, a village in the comarca (county) of Priorat, province of Tarragona in the autonomous region of Catalonia, Spain.
Molar behavior, or molara, larger units of behavior in psychology.
en.wikipedia.org /wiki/Molar   (133 words)

  
 Molar Volume of a Gas
Purpose: To determine the volume occupied by one mole of an ideal gas under conditions of standard temperature and pressure.
The molar volume of a gas is the volume occupied by one mole of an ideal gas.
Dividing the STP volume of the evolved oxygen by the number of moles of oxygen yields the molar volume.
www.sonoma.edu /chemistry/chem115A/molarvol.html   (795 words)

  
 molar volume vs atomic volume
molar volume=the volume of one mole of that substance.
Molar and atomic volumes are different because we're talking different amounts of the material.
Molar volume takes into account how closely the atoms are packed and the spaces between them while atomic volume is only for a single atom.
www.chemicool.com /forum/post-1029.html   (329 words)

  
 Forces and Bonding: Molar Volume of a Gas
The gaseous phase of matter was the last to be recognized by early scientists because most gases are invisible, and all gases require techniques of collection and handling that are not necessary with the liquid and solid phases of matter.
From the measured state properties (pressure, volume, and temperature) of the gas collected, the ideal gas constant will be estimated, and the molar volume (volume occupied by one mole at T = 273 K and P = 1.00 atm) of the gas will be determined.
Estimate the value of the ideal gas constant, R. Estimate the molar volume of hydrogen gas.
www.wpi.edu /Academics/Depts/Chemistry/Courses/General/molarvolume.html   (573 words)

  
 Free Essay Lab - The Molar Volume of Gases
The purpose of this lab was to learn to determine molar volume in an experimental environment utilizing two different methods.
Simply dividing the volume of O2 by moles of O2 (hence L/mol = Molar Volume), we found the molar volume of oxygen to be 24L/mol.
The molar volume that we determined for hydrogen is slightly higher than what we found for oxygen (by 0.5L/mol).
www.echeat.com /essay.php?t=94   (638 words)

  
 partial molar volume (chen)
This excess volume can be expressed in terms of the mole fraction of either ethanol or water, and the magnitude of the excess volume provides a measure of non-ideal mixing of water and ethanol molecules.
The existence of the excess volume indicates that molar volumes are non-additive.
Similarly, calculate values for the partial molar volume of water at each adjacent set of concentrations at each temperature and plot your results as a function of mole fraction of ethanol.
www.stetson.edu /~wgrubbs/datadriven/fchen/bartender/partialmolarvolumechen.html   (1024 words)

  
 Experiment 9
The relationship between the volume of a gas and its absolute temperature at constant pressure and number of moles of gas (Charles' Law) is given as:
The molar volume of a gas is the volume that one mole of a gas occupies and has a theoretical value of 22.414 L/mol at STP.
The molar volume of hydrogen, Vm in units of L/mol, may then be obtained using Equation 8 where n represents the number of moles of H2 generated and V is its volume (L) at STP.
core.ecu.edu /chem/chemlab/exper10/objectives.htm   (491 words)

  
 Chem1 Properties of gases: Dalton's law
The molar volumes of all gases are the same when measured at the same temperature and pressure.
Calculate the approximate molar mass of a gas whose measured density is 3.33 g/L at 30°C and 780 torr.
The atmospheric pressure was 754 torr, the temperature was 22°C, and the volume of the gas was 155 mL.
www.chem1.com /acad/webtext/gas/gas_3.html   (2090 words)

  
 Middle Part determination of molar volume of gas experimental sheet   (Site not responding. Last check: 2007-11-03)
If the volume of hydrogen gas produced is measured then the molar volume, i.e.
volume that one mole occupies, of a gas may be calculated.
(3) From the answer to (2) and the noted volume of hydrogen gas produced, calculate the volume one mole of hydrogen would occupy (the molar volume) in dm
www.rjclarkson.demon.co.uk /middle/molarvolexpt.htm   (262 words)

  
 Lab: Magnesium and Hydrogen: Molar Volume
In this experiment, the volume of a sample of hydrogen gas is measured.
The volume of one mole of hydrogen is calculated at room temperature and pressure using stoichiometry.
This is the volume of any type of gas under the conditions in the classroom at the time of the experiment.
home.gwi.net /~dakeller/Chem/Lab-Mg.H2.Molar.Volume.html   (691 words)

  
 lesson 9-5 Volume-Volume Problems
Avogadro's law tells us that "at equal temperatures and pressures, equal volumes of different gases contain the same number of particles." This lead to the idea of a standard for the volume of one mole of gas.
Each element or compound has its own individual molar mass, but the molar volume of all gases is the same.
Molar volume of a gas at STP = 22.4 dm
www.fordhamprep.org /gcurran/sho/sho/lessons/lesson95.htm   (953 words)

  
 UMass Lowell Freshman Chemistry Lab
This is the mass of water collected in the beaker (which can be related to the volume of oxygen which was produced from the reaction of the sample of potassium chlorate in the test tube).
That is, the apparatus was set up so that the volume of water collected would exactly equal the volume of oxygen generated by the chemical reaction.
Since the pressure is not specified in the question, you can assume that the pressure is 760 mm (1.00 atm) which is approximately the pressure under which this experiment was performed (or you could use the actual pressure of your own experiment).
faculty.uml.edu /james_hall/84123/9.htm   (1854 words)

  
 molar volume — Infoplease.com
Anisotropic dielectric properties of polyimides consisting of various molar ratios of meta to para diamine with trifluoromethyl group.(Statistical......
Free volume microprobe studies on Poly(methyl methacrylate)/Poly(vinyl chloride) and Poly(vinyl chloride)/Polystyrene blends.
On the use of pressure-volume-temperature data of polyethylene liquids for the determination of their solubility and interaction parameters....
www.infoplease.com /ce6/sci/A0833605.html   (303 words)

  
 Molar Solutions
1 mole of a compound is dissolved in a total volume of 1 litre.
If you dissolve 58.44g of NaCl in a final volume of 1 litre, you have made a 1M NaCl solution.
Many of the solutions you will use are described in terms of their molarity, so check that you are comforable with the concept by describing how you would make 500mL of a 0.05M NaCl solution.
www.wellesley.edu /Biology/Concepts/Html/molarsolutions.html   (137 words)

  
 EXPERIMENT 26
Determine the length of magnesium necessary to obtain the volume results you arrived at in your Pre-Lab work and cut 3 pieces to the correct length.
Move the tube up or down (to equalize pressure) until the water level in the tube is the same as that in the beaker (or as close as possible).
On the scale of the gas measuring tube read the volume of the gases in the tube.
www.angelfire.com /ny5/eastchemistry/APLAB01MolarVolume.htm   (794 words)

  
 lesson 9-4 Mixed Mass-Volume Problems
A) dividing by molar mass in the event that a mass is given, or
B) dividing by molar volume in the event that a volume is given.
volume of a gas at STP = # of moles of the gas x molar volume of gases at STP (22.4 dm
www.fordhamprep.com /gcurran/sho/sho/lessons/lesson94.htm   (568 words)

  
 Using Molar Volume
This is a basic exercise in the use of molar volumes of the elements.
The best source of molar volumes is the VWR Periodic Table and the data from that table is used in this page.
In the solution "MV" is used as the symbol for molar volume.
proton.csudh.edu /homeworkcs/hwusemolarvolcsn7.html   (111 words)

  
 NMR Blog
One option is to use our 5mm thick walled (1.4mm wall) NMR tube, which has a 0.19ml fill volume compared to the 0.71ml fill volume of our standard 0.38mm wall tube at 50 mm sample height.
Molar concentrations and volume calculations in NMR tubes
In the original question, the student asked for the molar and mass concentrations of a 25k Daulton protein, of which 2.5 mg were dissolved in 1 liter of water.
www.nmrtubes.com /blog/nmrblog.html   (2370 words)

  
 Chemistry: WebElements Periodic Table : Periodic properties : Molar volume: Definition
The molar volume is equal to the atomic weight divided by the density.
The molar volume is also known as the atomic volume.
The molar volume depends upon density, phase, allotrope, and temperature.
www.webelements.com /webelements/properties/text/definitions/molar-volume.html   (167 words)

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