Energy of reactant higher than energy of product favours A. Endothermic_______________?
Correct answer: A. Exothermic
- A. Exothermic
- B. Moderate reaction
- C. No reaction
Explanation
If the reactants have more energy than the products, the energy difference is released to the surroundings as heat, making the reaction exothermic. In an endothermic reaction, the products have higher energy than the reactants. Students often choose the opposite classification by focusing on energy absorption rather than comparing reactant and product energies.
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About Exothermic and Endothermic Reactions
Exothermic reactions release heat to the surroundings and have negative enthalpy change, while endothermic reactions absorb heat and have positive enthalpy change. The topic uses energy profiles to identify reactants, products and activation energy, and includes bond energy, enthalpy diagrams, calorimetry and Hess's law for calculating overall heat changes.
Practise Thermochemistry and Energetics of Chemical Reactions
729 free Thermochemistry and Energetics of Chemical Reactions MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
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