Identify the factor from following on which heat of reaction does not depend.
Identify the factor from following on which heat of reaction does not depend.
Physical states of reactants and products.
Total number of steps in which reaction occurs.
Temperature of the reaction.
Whether the reaction is carried out at constant pressure or constant volume.
Solution
The correct answer is $(B)$ Total number of steps in which reaction occurs.
The heat of reaction (also known as enthalpy change, $\Delta \mathrm{H}$ ) depends on several factors, but the total number of steps in which a reaction occurs (i.e., whether the reaction occurs in one step or multiple steps) does not affect the heat of reaction. According to Hess's Law, the enthalpy change of a reaction is the same, regardless of the number of steps in which the reaction occurs, provided the initial and final states of the system are the same.