Question

In an exothermic reaction, the total enthalpy of reactant is greater than that of products.

State whether the statement is True or False

• A. True
• B. False
• C. In an exothermic reaction, the total enthalpy of reactant is than that of products.
• D. Both option B and C

Answer 1

The correct option is A True

Exothermic reactions are the chemical reactions which proceed with the evolution of heat energy.
Consider the reaction $A+B\to C+D+q$.
Here, q is the heat energy released during this exothermic reaction.
The enthalpy change for this reaction is $\Delta H_{rxn}=H_{products}-H_{reactants}=-q$
Negative sign indicates that heat is released in the reaction.
Hence, $H_{reactants}=H_{products}+q$
Thus, in an exothermic reaction, the total enthalpy of reactant is greater than that of products.