Question

Give an example by giving equation in which heat is given from outside to bring
about reaction.​

Answer 1

Answer:

4Fe + 3O2 → 2Fe2O3 ΔH⚬ = - 1648 kJ/mol.

heat is given

Answer 2

Answer:

The chemical reaction in which the heat is absorbed. In this the heat is applied to the reaction as reactant these type of reaction is endothermic reactions.

These reactions lower the temperature of their surrounding area, thereby creating a cooling effect.

• Enthalpy change (ΔH) is positive

Example:

NH4Cl (s) + H2O (l) ➡ NH4Cl (aq) – Heat