A reaction which does not occur in nature is:
Correct answer: D. Non-spontaneous reaction
- A. Spontaneous reaction
- B. Exothermic reaction
- C. Endothermic reaction
- D. Non-spontaneous reaction
Explanation
A reaction that does not occur in nature is often referred to as a "non-spontaneous" or "non-natural" reaction. These reactions are thermodynamically unfavorable and do not occur without the input of energy or some external driving force. In other words, the Gibbs free energy change (∆G) for such reactions is positive, indicating that they are not favored under standard conditions. An example of a non-spontaneous reaction is the electrolysis of water to produce hydrogen and oxygen gas: 2H2O(l) → 2H2(g) + O2(g)
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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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