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Dalton’s Law of Partial Pressures

Dalton’s Law of Partial Pressures. The pressure of a gas is equal to the sum of all of its components. P total = P gas#1 + P gas#2 + P gas#3 +…. All in kPa. [http://www.space.gc.ca/asc/img/neemo_daltons_law.gi]f. Boyle ’ s Law.

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Dalton’s Law of Partial Pressures

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  1. Dalton’s Law of Partial Pressures • The pressure of a gas is equal to the sum of all of its components. • Ptotal = Pgas#1+ Pgas#2+ Pgas#3 +…. All in kPa [http://www.space.gc.ca/asc/img/neemo_daltons_law.gi]f

  2. Boyle’s Law • When temperature is constant, pressure and volume are inversely related. • P1V1 = P2V2 http://wps.prenhall.com/wps/media/objects/476/488316/Instructor_Resources/Chapter_11/FG11_13.JPG Click Here for a Demo

  3. http://wps.prenhall.com/wps/media/objects/602/616516/Media_Assets/Chapter09/Text_Images/FG09_06.JPGhttp://wps.prenhall.com/wps/media/objects/602/616516/Media_Assets/Chapter09/Text_Images/FG09_06.JPG

  4. Boyle’s Law • If a weather balloon has a volume of 15.0 L at a pressure of 1.20 atm, and the pressure drops to 0.750 atm, what is the new volume? • (15.0 L) (1.20 atm) = (0.750 atm) V2 • V2 = 24.0 L

  5. Charles’s Law • When pressure is constant, the temperature and volume are directly related. http://wps.prenhall.com/wps/media/objects/602/616516/Media_Assets/Chapter09/Text_Images/FG09_07.JPG Click Here for a Demo

  6. http://wps.prenhall.com/wps/media/objects/602/616516/Media_Assets/Chapter09/Text_Images/FG09_07-02UN.JPGhttp://wps.prenhall.com/wps/media/objects/602/616516/Media_Assets/Chapter09/Text_Images/FG09_07-02UN.JPG

  7. Charles’s Law • If a car tire has a volume of 2.50 L at 15.0 ºC and is heated to 65.0 ºC, what will be the new volume?

  8. Combined Gas Law • Useful connection between Boyle’s & Charles’s Laws…

  9. Combined Gas Law • Example: (Charles’s Law) • T1 = 273 K, V1 = 1.00 L, T2 = 373 K • Pressure is held constant so just remove it from the equation…. V2 = 1.37 L

  10. Combined Gas Law • Example: (Boyle’s Law) • P1 = 1.00 atm, V1 = 1.00 L, V2 = 3.00 L • Temperature is held constant so just remove it from the equation…. P2 = 0.333 atm

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