An isoperibol calorimeter is described ; and the device has been tested with the dissolution of [Tri (methyl hydroxy) amino methane] in HCl 0,1 M/Kg solution. Test reaction gave ΔH = 30,07 KJ mol. The results obtained with this device for the βT.C.P. dissolution in HNO3 55 Wt % lead to ΔH = -154,89 ± 0,33 KJ.mol.
A. Ben Cherifa, B. Omezzine, M. Jemal