Question

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

Answer 1

Explanation: A thermochemical equation is a balanced chemical equation which require an enthalpy change.

A balanced equation is the equation in which number of atoms on reactant side is same as the number of atoms on product side.

A thermochemical equation for $CaCl_2+H_2O$ is:

$CaCl_2+2H_2O\rightarrow Ca(OH)_2+2HCl+heat$

Here, heat is released in the reaction hence, it is a type of exothermic reaction.

A thermochemical equation for $NH_4NO_3+H_2O$ is:

$NH_4NO_3+heat\overset{water}{\rightarrow} NH_4^++NO_3^-$

Here, heat is absorbed in the reaction hence,it is a type of endothermic reaction.