Thermochemical properties of dialkylammonium halides of the general formula [(CnH2n+1)(2)NH2]X, where (X=Br, I and n=3 or 4) they were analyzed by the methods of thermoanalysis (TG, DTG, DTA, DSC). The kinetic parameters were studied using non-isothermal thermogravimetric curve. The lattice energy was obtained considering the contributions of the calorific capacity in solid phase and effects of polymorphic transitions that these compounds suffer in the 0-298 K. The volatilization kinetics were analyzed by the method of Ozawa, The results were according to the data of the literature using the standard method, being verified that the value of activation energy was twicely that of volatilization enthalpy.