View Single Post
  #8   Report Post  
Old 05-03-2004, 04:36 AM
Harry Muscle
 
Posts: n/a
Default DIY CO2 system question (Correct calculations)

"Morten" wrote in message
...
Ken,

"Ken Pinard" wrote in message
...
Ok, now I am getting even more curious,

Do you happen to know the volume of 2 mols of CO2? How about the

volume
of single bubble from a 1/4" (standard) air line?



Well, any ideal gas will have a volume of 22.4 L/mol at 298 Kelvin (25
degrees Celcius) so 44.8 L for 2 mol CO2

Given the example with 200 g sugar and 2.2203 mol CO2 it would give 2.2203
mol * 22.4 L/mol = 49.734 L from 200g sugar at 1 bar.


The exact formula is the ideal gas law: pV=nrT where p=pressure, V=volume,
n=mol gas, r=gas constant and T=temperature in Kelvin. At p=1 bar this

gives
V=nrT


I can't find my maths book so I cant remember how to calculate the volume

of
a bubble or a ball if we assume that a bubble is ball shaped, it's not but

I
think it's close enough :-)


Does anybody remember this or have a old maths book handy?


Regards

Morten


---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.611 / Virus Database: 391 - Release Date: 03/03/2004



According to google the volume of a sphere is 4/3 * pi * r^3.

Harry




-----= Posted via Newsfeeds.Com, Uncensored Usenet News =-----
http://www.newsfeeds.com - The #1 Newsgroup Service in the World!
-----== Over 100,000 Newsgroups - 19 Different Servers! =-----