When does it mean, when a reaction is exothermic?
Correct answer: C. Heat is transferred from the system to surrounding
- A. Energy content of product is more
- B. Energy content of reactant is less
- C. Heat is transferred from the system to surrounding
- D. Heat is transferred from the Surrounding to the system
Explanation
The correct option is C) Heat is transferred from the system to surrounding. In an exothermic reaction, the system releases heat, and heat is transferred from the system to the surroundings, resulting in a decrease in the system's energy. Exothermic reactions are those in which the system loses energy, primarily in the form of heat, to the surroundings. These reactions are often associated with a rise in temperature and a negative change in enthalpy (ΔH), indicating a decrease in the system's energy content.
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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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