Give the correct thermochemical equations for a (cacl2+h2o) pack and (nh4no3+h2o) pack.

In a pack of CaCl2 and H2O, hydrolysis of Ca+2 will occur

This will result in formation of Ca (OH) 2.

The reaction is exothermic in nature

so the balanced thermo-chemical equation will be

CaCl2 (aq) + H2O (l) - --> Ca (OH) 2 + 2HCl + Heat

In a pack of NH4NO3 and H2O hydrolysis of NH4 + will occur as

NH4NO3 (aq) + H2O (l) + Heat - --> NH4OH (aq) + HNO3 (aq)

It is an endothermic reaction