Respuesta :
Answer: It is an exothermic process because heat energy is absorbed by the water as the NaOH(s) dissolves in it.
Explanation:
Endothermic reaction : It is a type of chemical reaction where the energy is absorbed from the surrounding. In the endothermic reaction, the reactant are less than the energy of product. In endothermic reaction, the change in enthalpy is, positive
Exothermic reaction : It is a type of chemical reaction where the energy is released into the surrounding. In the exothermic reaction, the energy of reactant are more than the energy of product. In exothermic reaction, the change in enthalpy is, negative.
Thus as energy is absorbed by water, which has been released by NaOH, the process is exothermic.
The dissolution of NaOH in water has been an exothermic reaction, in which the energy has been absorbed by the water. Thus, option C is correct.
The formation and breaking of a bond result in the absorption and the release of energy during a chemical reaction. The reaction has been differentiated as endothermic and exothermic reaction based on energy released and absorbed.
Dissolution of NaOH in water
The chemical reaction in which energy has been released in termed as exothermic reaction. The chemical reaction in which energy has been absorbed is termed as endothermic reaction.
The exothermic reaction results in the increase in the temperature of the reaction mixture, while endothermic reaction cools down the reaction mixture.
The dissolution, of NaOH in water, results in the increase in the temperature of the water. Thus, there has been release of the energy from the NaOH, determining it as an exothermic reaction.
The energy released by NaOH in dissolution has been absorbed by the molecules of water.
Thus, the exothermic reaction with the absorption of energy by water has been observed in dissolution of NaOH in water.
Thus, option C is correct.
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