Question

what is spontaneity???​

Answer 1

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$\small\bold\red{Spontaneity}$

All the natural process which take place on their own sometimes initiation is required are called spontaneous process or spontaneity or feasibility.

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Answer 2

In thermodynamics, a spontaneous process is a process which occurs without any external input to the system. A more technical definition is the time-evolution of a system in which it releases free energy and it moves to a lower, more thermodynamically stable energy state.