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Estimating Henrys Law constant C02

  • Thread starter febbie22
  • Start date
  • #1
38
0
I was given the table below all i want to do is estimate the Henry's constant at -10 and 60 degrees. Just wondering the best way to go about this.

Would it be to take the log of the graph and add a treadline?

HENRY’S LAW CONSTANT FOR CO2

TEMPERATURE (0C)
HENRY’S LAW CONSTANT (Kh/10,000, atm)​
0
0.073​
10
0.104​
20
0.142​
30
0.186​
40
0.233


Cheers.
 

Answers and Replies

  • #2
rude man
Homework Helper
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You should fit your data to theory:

k(T) = k(T0)exp(-k1/T + k2)

where k(T0) ~ 0.142
k1 ~ 2400 for CO2
k2 ~ k1/T0

I would set k1 and k2 to the above values exactly and then fit the data for k(T0) only, but maybe that would probably be cheating.
 
  • #3
38
0
I think i have to do the log of the graph then use quadratics and polynomials to compare and conclude. Does anyone know how i can use polynomial treadlined graphs to calculate the henry's constant which is in the x axis.
 

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