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Molar Volume

Molar Volume. Avogadro’s Law : Equal volumes of gas at the same temperature and pressure contain equal numbers of particles . But the mass is different!!!. [http://wps.prenhall.com/wps/media/objects/476/488316/Instructor_Resources/Chapter_11/FG11_26-03h.JPG]. Molar Volume.

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Molar Volume

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  1. Molar Volume • Avogadro’s Law: • Equal volumes of gas at the same temperature and pressure contain equal numbers of particles. • But the mass is different!!!

  2. [http://wps.prenhall.com/wps/media/objects/476/488316/Instructor_Resources/Chapter_11/FG11_26-03h.JPG][http://wps.prenhall.com/wps/media/objects/476/488316/Instructor_Resources/Chapter_11/FG11_26-03h.JPG]

  3. Molar Volume • 1 mole of any gas occupies 22.4 L at Standard Temperature & Pressure (STP) [http://wps.prenhall.com/wps/media/objects/602/616516/Media_Assets/Chapter09/Text_Images/FG09_09-04UNT04.JPG]

  4. Molar Volume • What is STP? • Scientists designate this so that measurements can be made anywhere under controlled conditions. • T = 273 K • P = 1 atm

  5. Molar Volume • Example: • What is the volume of 20.0 g of Argon gas at STP? 20.0 g Ar 1 mol Ar 22.4 L Ar = 11.2 L Ar 40.0 g Ar 1 mol Ar

  6. Molar Volume • Example: • A helium balloon is filled to a volume of 4.00 L, how many helium atoms is this at STP? 4.00 L He 1 mol He 6.02 x 1023 atoms 1 mol He 22.4 L He = 1.08 x 1023 atoms He

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