Concept:A spontaneous process is one that occurs on its own without external intervention. These processes have a natural directional flow and cannot be reversed without applying external work.
Formula:$$ \Delta G < 0 \text{ (for spontaneous processes)} $$
Solution:- Spontaneous processes proceed in a specific direction, making them unidirectional.
- Because they occur naturally in real-world conditions with an overall increase in entropy, they are irreversible and real processes.
- Therefore, all the given characteristics accurately describe a spontaneous process.
Why other options are incorrect:Options A, B, and C are incomplete individually because a spontaneous reaction encompasses all three listed characteristics. Hence, 'All of above' is the only fully correct choice.
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