PVnRTkey

PVnRTkey - Gases & Pressure Chemistry 109 Lyric of the...

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Chemistry 109 Lyric of the Week: “The hardest to learn was the least complicated” – Indigo Girls –  Least Complicated Describing Pressure Example:  1. What is the equivalent pressure of 735 mm Hg in each of the following units?      atm torr 735 mmHg x 1 atm = 0.967 atm 735 mmHg = 735 torr 760 mmHg lb in -2 bar 0.967 atm x 14.7 lb in     -2      = 14.2 lb in -2 735 torr x 1 bar                      = 0.980 bar or 0.954 bar 1 atm       770.07 torr The Ideal Gas Law PV=nRT Calculation Examples 1.  A 1.5 g sample of CO 2  gas has a volume of 3.0 L at 25 ° C. What pressure (in mm Hg) does this gas exert? 25 o C = 298 K PV=nRT P = nRT/V = (1.5 g x 1 mol  ) (0.08206 L atm)  (298 K)                    44 g                                     mol K                            
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PVnRTkey - Gases & Pressure Chemistry 109 Lyric of the...

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