Which one of the following reactions is spontaneous?
Correct answer: D. Irreversible
- A. Endothermic
- B. Exothermic
- C. Reversible
- D. Irreversible
Explanation
Irreversible reactions can proceed in one direction only. The products of the reaction cannot be converted back into the reactants without the input of energy, thus making it a spontaneous 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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