In class notes for October 5, 2007

In class notes for October 5, 2007 - General Chemistry...

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In class notes for October 5, 2007 Chapter 5 OWL due October 8, 2007 at 11:59 pm o Check online because this will most likely be extended Last Lecture o Ideal gas law Today o Partial pressures and Dalton o Kinetic Theory of gases Charles’ Law o 4L balloon at 298 K o ? L at 77 K (liquid N 2 ) o = = = . V V1T1 T2 4L298 K 77K 1 0 L Demonstration using Charles’ Law You cannot make the balloon 1.0 L using liquid N 2 because the air is mostly composed of nitrogen. Clicker Question I have 3 balloons each with a volume of 22.4 L at 1.0 atm and containing 1 mole gas. One is filled with He, the others Xe and N 2 . Is there any physical difference between these balloons. Yes or No Gas density o Density is mass per unit volume. Gass density is usually g/L. (liquids are often g/mL) o Moles (n) and voluve are both in the ideal gas equation o = ( ) ( )= n mass g molar mass gmol mMW o So the density is MWPRT o Density is used to distinguish between gas samples
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In class notes for October 5, 2007 - General Chemistry...

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