The salt cesium perchlorate is soluble in water. When 3.91 g CsClO₄ is dissolved in 110.00 g water, the temperature of the solution decreases from 25.00 C to 23.06 C. Based on this observation, calculate the dissolution enthalpy, _dissH, of CsClO₄. Assume that the specific heat capacity of the solution is 4.184 J g^-1 C^-1 and that the energy transfer to the calorimeter is negligible.

_dissH =_kJ/mol