The reactions that need energy are called _.
Correct answer: A. Endothermic reactions
- A. Endothermic reactions
- B. Exothermic reactions
- C. Exergonic reactions
- D. Heat releasing reactions
Explanation
Endothermic reactions are those reactions which requires heat or energy from surrounding.When an endothermic reaction occurs, the heat required for the reaction is taken from the reacting materials (system) and the temperature of the system falls below the initial temperature. Eventually, the temperature of the system rises to room temperature again as heat is absorbed from the surroundings. They are also called as consuming reactions or endergonic 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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