vapor density การใช้

• Dumas perfected the method of measuring vapor densities which was also important in determining atomic weights ( see below ).
• "' Saturation vapor density "'( SVD ) is a concept closely tied with saturation vapor pressure ( SVP ).
• In addition to this list of some of the new substances he prepared, reference may be made to his work on abnormal vapor densities.
• With Henri Sainte-Claire Deville, he worked on determining vapor densities at high temperatures and conducted studies on the porosity of metals at high temperatures.
• It has a vapor density 3.4 times greater than that of air, allowing it to remain low in the air for long periods of times.
• As relative humidity is a dimensionless quantity ( often expressed in terms of a percentage ), vapor density can be stated in units of grams or kilograms per cubic meter.
• A higher vapor density of Oxygen would actually make it easier to breath, to the point of getting too much O2 . talk ) 19 : 47, 28 July 2012 ( UTC)
• To order of magnitude, you might expect to lose heavy water at a rate that is of order the area of your exposed surface times the ambient air velocity times the saturation vapor density.
• In many cases, the liquid density is much greater than the vapor density, \ rho _ L \ gg \ rho _ V, so that F ( t ) can be approximated by the original zero mass transfer form F ( t ) = R ^ 2dR / dt, so that
• The values shown at hyperphysics-sources indicate that the saturated vapor density is 4.85 g / m 3 at 273 K, at which the saturated vapor pressure is 4.58 mm of Hg or 610.616447 Pa ( 760 mm of Hg H " 1 atm = 1.01325 * 10 5 Pa ).
• He formulated a law to determine relative atomic masses of elements : " the different quantities of the same element contained in different molecules are all whole multiples of the atomic weight " and determined relative atomic masses and molecular masses by comparing the vapor density of a collection of gases with molecules containing one or more of the chemical element in question.
• While working on the olefins he noticed that a change takes place in the density of the vapor of amylene hydrochloride, hydrobromide, & c, as the temperature is increased, and in the gradual passage from a gas of approximately normal density to one of half-normal density he saw a powerful argument in favor of the view that abnormal vapor densities, such as are exhibited by sal-ammoniac or phosphorus pentachloride . are to be explained by dissociation.