Question

what is Initial temperature and final temperature equations??

Answer 1

The only one that comes to mind is:\[\Delta T = T_{Final} - T_{Initial}\]

Answer 2

It is usually better to have too many details than too few, here are a few equations (with many simplifications) that may help you formulate the question better.

In aqueous solutions the heat capacity of water remains essentially the same for low concentrations of reactants, therefore an equation relating mols of reaction n_rxn, heat capacity of water Cp,water (simplified from heat capacity of the solution), the mass of the water m_water, the initial temperature Ti, the final temperature Tf, and the change in the enthalpy of reaction Delta H_rxn where a negative value corresponds to a exothermic reaction.

\[T _{f}=T _{i}-\Delta H _{rxn}*n _{rxn}/(C _{p, water}*m _{water})\]
This is the simplest equation I could think of for finding a temperature change with a chemical reaction. I hope this helps.