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Geek Culture / I need a math teacher.

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Unjust1
20
Years of Service
User Offline
Joined: 22nd Oct 2004
Location: Missouri
Posted: 11th Feb 2006 04:27
I am trying to solve a problem at work. I am not a chemical engineer and my college books cover electronics and computers, not chemistry. At any rate, I am trying to solve this problem.

I have a gas analysis with following composition.
Oxygen - O2 - 0.194 % normalized
Nitrogen - N2 - 2.282 % normalized
Carbon Dioxide - CO2 - 41.6205 % normalized
Methane - CH4 - 55.9035 % normalized
Total - 100.0000%

I know from researching on the internet that the following specific gravities are correct for the former gases.
Gas Phase Properties 32°F at 1 atm

Air = 1

O2 = 1.113
N2 = 0.9737
CO2 = 1.524
CH4 = 0.55

I need to find the gravity for our inlet flow meter. It is done using the specific gravity of the four gases and the percentage for each in an equation. My problem is I don't have said equation, and never really use this sort of math. I have been told the gravity should be around 0.975. If anyone has any experience in this sort of problem, I would greatly appreaciate any help.

re faze
20
Years of Service
User Offline
Joined: 24th Sep 2004
Location: The shores of hell.
Posted: 11th Feb 2006 15:24
couldnt you just multiply the specific weights by their respective percentage
ex: for the nitrogen (.002282*0.9737) and then after you get the sum, multiply by the volume so you get the percentage of the weight for each gas?

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