Heat of Dilution for H2SO4

[Iomcube]

I am unable to find a suitable value for Heat of Dilution of concentrated H2SO4. I will share my calculation here as well but first I need this value to be settled.

I have x2 documents
1] 95 kJ/mol

https://scilearn.sydney.edu.au/firstyear/exams/chem1101/2008answers/2008-J-13.pdf

2] 71.76 kJ/mol

http://dpuadweb.depauw.edu/harvey_web/Chem260/Chem260pdfs/WorksheetKeys/diluteStrongAcid_key.pdf

Background: I am determining cooling load while drying wet Cl2 gas using circulated H2SO4 in a drying packed tower (98w.t% > 78w.t%)

https://files.engineering.com/getfi...-4ee5-ba12-b19367f58518&file=Screenshot_2.png

 

[pierreick]

Hi,
Consider this brochure to support .
Pierre

 

[Iomcube]

Can anyone check my calculations. Especially the part where I calculated the amount of hydrated acid ..bcz this is directly linked with heat generated

Thank pierreick for the help!

 

[pierreick]

Hi,
Another resource to cross check your calculation. # 7.
Pierre

 

[pierreick]

Hi,
Another resource about enthalpy of mixing.
Pierre

 

[Iomcube]

pierreick (Chemical),
Extremely thanks for the resource. BTW the last one is valid upto 10 wt% of acid & I am handling 78 - 98%
However, your literature proved highly helpful. A side observation:

p-17 of your 2nd last resource. Why the metal loss is highest b/w 80-83wt% of acid while it lowers again at below concentrations than this. Any microscopic stuff happening here?

 

[IRstuff]

Seems to me there might be a tradeoff between availability of the acid molecules at the surface vs. the diffusivity of the free molecules in reaching to the surface.

TTFN (ta ta for now)
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[horacio Torres]

Heat and material balances By Himelblau

It has the dilution tables for sulfuric acid.

Horacio

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