The reactions that release heat are called:
Correct answer: B. Exothermic reactions
- A. Endothermic reactions
- B. Exothermic reactions
- C. Endergonic reactions
- D. Heat gaining reactions
Explanation
Exothermic reactions are the reactions that release heat to their surroundings, causing the surroundings to warm up while the system loses energy. This is the correct answer for the question. Example: combustion reactions.
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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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