Answer:
The correct answer is option b.
Step-by-step explanation:
Exothermic reactions are defined as the reactions in which energy of reactants is more than the energy of the products. In these reactions, energy is released by the system. The total enthalpy of the reaction
comes out to be negative.
In these reaction , products are favored when temperature is kept low. And when we allow these reaction to take place at higher temperature they favor reactant side.
Endothermic reactions are defined as the reactions in which energy of products is more than the energy of the reactants. In these reactions, energy is absorbed by the system. The total enthalpy of the reaction
comes out to be positive.