The process that can be both endothermic and exothermic out of the following is:
Correct answer: A. Dissolution
- A. Dissolution
- B. Crystallization
- C. Bond breaking
- D. Condensation
Explanation
The process of dissolving can be endothermic (temperature goes down) or exothermic (temperature goes up). When water dissolves a substance, the water molecules attract and "bond" to the particles (molecules or ions) of the substance causing the particles to separate from each other.The process of dissolving can be endothermic (temperature goes down) or exothermic (temperature goes up).Ammonium nitrate dissolving in solution is an endothermic reaction. As the ammonium nitrate dissolves, heat energy is absorbed from the environment causing the surrounding environment to feel cold. The dissolution of calcium chloride in water is an example of an exothermic reaction.
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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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