This video explains how to calculate molecular volume using density and mass, demonstrating that water vapor occupies approximately 1000 times more volume than liquid water, and applies the ideal gas law (PV = nRT) to determine that one mole of gas occupies 22.4 liters at standard temperature and pressure.
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illustration 1,2,3,4 and exercise 1,2 chapter 13(em) of 11 science
Added:foreign the density of water is 1000 kg per meter cube the density of water vapor at 100 degree celsius and one atm pressure is 0.6 kg per meter cube the volume of molecules multiplied by total number of molecular volume molecular volume means density of we can write volume means volume eight vapor and upon total volume and vapor water molecular volume means water calm volume [Music] tea of vapor upward density of water of water vapor key density of 4g 1.6 water [Music] [Applause] plus oxygen 16 then 18 gram per moles milligram 18 into 10 is to minus 3 kilograms then 1 atom comes [Music] foreign now m naught 18 into 10 is to minus 3 6.02 into 10 is to 23 18 by 6 approximate 3 into 10 is to minus 26 kg means [Music] now mass will be 3 into 10 is to minus 26 density 10 is to 3 then volume 3 into 10 raised to minus 29 meter cube volume radius 5 greater the volume formula 4 by 3 pi r cube equal to 3 into 10 is to minus 90 then r cube equal to 3 into 10 raised to minus 29 multiply 3 divided minus 10 to calculate then 8 cube root 2 10 is to minus 13 1 by 3 power 10 meters radius what is the average distance between atoms in water average distance means diameter of water everything distance means the [Music] water and vaporization water is 10 ish to 3 times larger than volume of vapor water at vapor positions [Music] inversely proportional 10 raised to 3 times media then vaporization formula 4 by 3 pi capital r cube 10 raise to 3 4 by 3 pi small r cube 4 by 3 pi 4 by 3 pi cancel then r cube equal to 10 raise to 3 r cube therefore r equal to 10 [Music] reactive the ratio of their particular pressure [Music] capital and and neon upon no2 into m neon [Music] into 20.2 the fractional of molecular volume to the actual volume occupied by the oxygen gas at http standard temperature and standard pressure volume you have to [Music] 22.4 liter 22.4 into 10 raised to minus 3 meter cube radius equal to 1.5 angstrom 10 is to minus 10 meter mega now put this value four pi r one point five to ten raised to minus ten q six point zero two into ten is to twenty three divide by three or yeah actual volume eight point [Music] upon molecular volume [Music] minus six divided by twenty two point four into ten raised to minus three or em calculator a four into ten is to minus four millimeter of molecular volume key definition second numerical d1 molecular volume is the volume of occupies by one that means temperature of 4g 1 [Music] [Music] is equal to mu r t then v equal to mu r t upon p mu one eight point three one four two seventy three divided by one point zero one into ten leads to five twenty two point four into ten lives to minus three meter cube twenty two point four liters so molecular volumes twenty two point four seven ideal gas formula thank you very much
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