Concept:A reaction between an acid and a base that produces a salt and water is known as a neutralization reaction. The heat released during this process is classified accordingly.
Formula:$$ \text{Acid} + \text{Base} \rightarrow \text{Salt} + H_2O \quad (\Delta H = \Delta H_n^\circ) $$
Solution:- \( CH_3COOH \) is acetic acid (a weak acid) and \( NaOH \) is sodium hydroxide (a strong base).
- They undergo a double displacement reaction to form sodium acetate (a salt) and one mole of water.
- The enthalpy change associated with forming 1 mole of water from the reaction of \( H^+ \) and \( OH^- \) ions is defined precisely as the Standard enthalpy of neutralization.
Why other options are incorrect:It is not a formation reaction (which requires elemental reactants). It is not a solution or hydration process because those involve dissolving a solute in a solvent, not a chemical acid-base reaction.
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