H3PO4 heat of dilution

[RockaRolla]

I'm going to dilute 85% phosphoric acid down to a 38% solution, and I'm trying to find out how much heat will be generated. I can't find anything more than basic (no pun intended) information in my old chemistry testbook, and I'm not having much luck online, either.
Can anyone give me a clue?

Thanks,

Steve

 

[25362]

http://www.potashcorp.com/media/pdf...fied_phosphoric_acid/PCS_phos_acid_manual.pdf

go to page #21 the graph No.9 gives you the information.

Be patient, it takes some time in rising.