Which of the following reactions is exothermi | vedclass

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Question

(A) An exothermic reaction is one that releases heat to the surroundings,characterized by a negative enthalpy change $(\Delta H < 0)$.$A$. The reactio

Vedclass · Accepted Answer

$KOH_{(aq)} + HNO_{3(aq)} \rightarrow KNO_{3(aq)} + H_2O_{(l)}$

Vedclass · Answer

(A) An exothermic reaction is one that releases heat to the surroundings,characterized by a negative enthalpy change $(\Delta H $A$. The reaction between a strong acid $(HNO_3)$ and a strong base $(KOH)$ is a neutralization reaction. Neutralization reactions are always exothermic because they involve the formation of water from $H^+$ and $OH^-$ ions,releasing energy.$B$. The melting of ice is an endothermic process as it requires the absorption of heat to break intermolecular hydrogen bonds.$C$. The dissolution of $NaCl$ in water is an endothermic process (or slightly endothermic) as it requires energy to overcome the lattice enthalpy of the crystal.$D$. The formation of nitrogen dioxide from nitrogen and oxygen is an endothermic reaction,requiring energy input.Therefore,the correct option is $A$.

Which of the following reactions is exothermic?

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