H2S+NaOH ==> NaHS + H20

[DougW]

closed thread798-141763 discussed making NaHS from H2S. I need to know the heat of solution. When the H2S is absorbed into the NaOH, how much heat is released? You would think this would be readily available, but I can't find it.

 

[kenvlach]

Re 'H2S is absorbed into the NaOH.'
Would this be crystalline or molten NaOH?
Maybe no such data. But, for aqueous solutions containing Na⁺ & OH^-, lots of data. Not as straightforward as you might hope, since multiple equilibria. At high pH, the H₂S solubilizes as HS^-(aq.). A good explanation is A Discussion of the Effect of pH on the Solubility of Hydrogen Sulfide by John J. Carroll.

From

http://www.telusplanet.net/public/jcarroll/ION.HTM

 

[DougW]

Thanks Kevin for the submittal. What I'm really looking for is the heat generated from this reaction. Like for every lb of H2S absorbed into 50% NaOH ==> x,xxx BTU of heat is generated.