JAMB/WAEC Chemistry 2027 EP 118 - Heat of Reactions (Heat Of Neutralization) + Free Past Questions

JAMB/WAEC Chemistry EP 118 - Heat of Reactions (Heat of Neutralization) + Free JAMB/WAEC Past Questions In this lesson, we study Heat of Neutralization, one of the major types of heat of reaction in Chemical Energetics. Heat of Neutralization explains the energy released when an acid reacts with a base to produce salt and water. This topic is frequently tested in JAMB, WAEC, NECO, and Post UTME Chemistry. Topics Covered • Heat of Reaction • Heat of Neutralization • Neutralization Reaction • Enthalpy of Neutralization • Exothermic Reactions • Chemical Energetics What Is Heat of Neutralization? Heat of Neutralization is the amount of heat released when one mole of water is formed during the reaction between an acid and a base under standard conditions. Neutralization reactions are generally exothermic because heat is given off during the reaction. General Neutralization Equation Acid + Base → Salt + Water + Heat Example: HCl(aq) + NaOH(aq) → NaCl(aq) + H₂O(l) + Heat In this reaction: ✔ Hydrochloric acid reacts with sodium hydroxide. ✔ Sodium chloride and water are produced. ✔ Heat is released. Characteristics of Heat of Neutralization ✔ It is an exothermic process. ✔ The enthalpy change (ΔH) is negative. ✔ One mole of water is produced during complete neutralization. Factors Affecting Heat of Neutralization ✔ Strength of the acid. ✔ Strength of the base. ✔ Concentration of the solutions. ✔ Volume of reactants. Applications of Neutralization ✔ Manufacture of salts. ✔ Treatment of acidic soils. ✔ Antacid tablets for stomach acidity. ✔ Wastewater treatment. ✔ Industrial chemical processes. Frequently Tested JAMB Areas 🔥 Heat of Neutralization 🔥 Neutralization Reactions 🔥 Enthalpy Change (ΔH) 🔥 Exothermic Reactions 🔥 Acids and Bases 🔥 Chemical Energetics Free JAMB/WAEC Past Questions 1. Heat of neutralization is the heat released when? A. One mole of oxygen is formed B. One mole of water is formed during an acid-base reaction C. One mole of salt is dissolved D. A metal reacts with water Answer: B 2. Neutralization is the reaction between an? A. Acid and metal B. Acid and base C. Metal and water D. Salt and water Answer: B 3. Heat of neutralization is generally? A. Endothermic B. Exothermic C. Reversible D. Catalytic Answer: B 4. Which of the following is produced during the neutralization of hydrochloric acid and sodium hydroxide? A. Hydrogen and oxygen B. Sodium chloride and water C. Carbon dioxide and water D. Sodium and chlorine Answer: B 5. The enthalpy change (ΔH) for a neutralization reaction is usually? A. Positive B. Zero C. Negative D. Infinite Answer: C Quick Revision Note ✔ Heat of Neutralization is the heat released when one mole of water is formed from an acid and a base. ✔ Neutralization reactions are exothermic. ✔ Acid + Base → Salt + Water + Heat. ✔ Heat is released to the surroundings. ✔ The enthalpy change (ΔH) is negative. This lesson is highly recommended for JAMB, WAEC, NECO, and Post UTME candidates preparing for Chemistry examinations. #JAMBChemistry #WAECChemistry #ChemicalEnergetics #HeatOfNeutralization #Neutralization #Enthalpy #ExothermicReaction #AcidsAndBases #ChemistryTutorial #JAMBPastQuestions #WAECPastQuestions #NECOChemistry #O3Schools #ChemistryLessons