A reaction gives out heat. This means that
Correct answer: B. bonds being made are stronger than bonds broken
- A. Only new bonds are being made
- B. bonds being made are stronger than bonds broken
- C. Only existing bonds are being broken
- D. bonds being broken are stronger than bonds made
Explanation
An exothermic reaction gives out heat energy. In an exothermic reaction, the energy absorbed during bond-making is greater than the energy released during bond-breaking. Therefore, the bonds being made are stronger than the bonds broken.
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About Thermochemistry and Energetics of Chemical Reactions
Thermochemistry measures energy changes in chemical reactions and distinguishes exothermic from endothermic processes. Work covers systems, surroundings and state functions, internal energy, the first law of thermodynamics, enthalpy and Hess's law, including the sign conventions used when heat enters or leaves a system.
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