(Thursday, Oct 22, 2009)
continuation of the mole..
This class we learned that the volume is occupied by a certain mass depends on the temperature and pressure. The Standard Temperature and Pressure (STP) is temperature = 0 degrees Celsius and pressure = 101.3 kPa. The volume of any gas at STP is 22.4 L for every mole.
22.4 L / 1 mol OR 1 mol / 22.4 L
Examples:
- Finding the volume (L) occupied by 0.0606 mol of CO2 at STP
*Multiply by 22.4 L / 1 mol
0.060 mol x (22.4 L / 1 mol) = 1.3 L
- Finding the mass of a 200.0 mL sample of NO2 at STP
*Multiply by 1 mol / 22.4 L, but mL must be converted to L. Note that NO2 has 46 g / mol.
200.0 mL x (1 L / 1000 mL) x (1 mol/ 22.4 L) x (46 g / 1 mol) = 0.41 g
Here's a website I found that can calculate STP: http://www.1728.com/stp.htm
That is all. Mr. Doktor is the best!
-- Jael Lumba
Subscribe to:
Post Comments (Atom)
Interesting link. Its not exactly what we talked about because the calculator looks at changing temperature and pressure, but hopefully you got the idea.
ReplyDeleteI'm not sure about the video though :-P I don't really know what the lyrics and music have to do with moles. I think I'll stick to Austin Powers. ;)