Posted: April 19, 2020
This week we will start looking at properties of gases. You should watch this video on properties of gases (33 minutes).
https://www.youtube.com/watch?v=nPa5XuFSRnQ
Copy and paste the link. Don't worry about partial pressure for now.(last part of the video)
Here is a different video with same info with different word problem examples (35 minutes). Take notes for when you need to do the word problems.
https://www.youtube.com/watch?v=uDOKaDqFts8
I wlll also assign Khan Academy for this.
- Video: Ideal gas equation: pV=nRT (9 minutes) The R is the ideal gas constant and the number is always 8.314 kPa·L/mol·K or 0.0821 atm·L/mol·K depending on what units are used for pressure.. The T is temperatrue and must be converted into Kelvin in this formula. 0°C = 273 K. To convert celcius to kelvin, you just add 273. For example, 20°C= 20 + 273 = 293 K. Pressure is measured in either atmospheres (atm) of kilopascals (kPa). n is moles which we learned about last week. V is volume and shold be in Litres (L)
- Video: Example 1 (10 minutes)
- Video: Example 2 (13 minutes) There is lots involved in this question. I usually break this down into sections, but he put it all together. He uses a formula from the very first youtube video given to you to watch in this section.
- Video: Example 3 (6 minutes)
- Video: Example 4 (5 minutes)
- Khan Academy assignment.(4 questions for this week)