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Specific Heats Of Caustic Solutions Above 78% [Naoh]?

specific heat caustic evaporation naoh

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#1 chemical_gopher

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Posted 02 April 2019 - 08:19 AM

Hi All,

 

I am interested in the heat capacities of caustic solutions of concentrations up to 90+% NaOH. The resources I have been able to find are limited to concentrations of up to 78% NaOH (such as here: https://www.oxy.com/...oda/caustic.pdf - pg 30). 

 

Is there a reason why this data is not available? Any help or sources with this information would be greatly appreciated!

 

 

Thanks,

CR



#2 thorium90

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Posted 02 April 2019 - 09:07 AM

Not sure. But my guess is solubility limit? I mean if it was 100% NaOH, then it won't be a solution anymore right...

 

Anyway, whats the purpose of this exercise?



#3 chemical_gopher

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Posted 02 April 2019 - 09:40 AM

Not sure. But my guess is solubility limit? I mean if it was 100% NaOH, then it won't be a solution anymore right...

 

Anyway, whats the purpose of this exercise?

 

According to the phase diagram of NaOH + Water there are unsaturated liquid solutions well above 78%, they just need to be at high temperatures. The phase diagram can also be found in the source I linked, pg 31. 


I am trying to calculate the amount of energy required to bring these higher concentration solutions to their boiling point. 



#4 breizh

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Posted 02 April 2019 - 05:35 PM

Hi,

 

Some data , probably similar to yours .

You may contact this organization

http://www.tappi.org...==#srch-textbox

 

 

 

 

Breizh

Attached Files


Edited by breizh, 02 April 2019 - 05:41 PM.





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