Is it necessary to be a spontaneous process IRREVERSIBLE........?

Dear student,

A process which takes place by itself, without any external aid under the given conditions is called a spontaneous process. It may require initiation.

Examples: (i) Flow of heat from a body at a higher temperature to a body at a lower temperature.

(ii) Movement of gas molecules from the region of higher pressure to a region of lower pressure.

(iii) Flow of water from a higher level to a lower level etc., are spontaneous physical processes.

(iv) Reaction between zinc and sulphuric acid to produce zinc sulphat{e} and hydrogen. (Zn + H₂S0₄ -> ZnS0₄ + H₂).

(v) Reaction between an acid and base to produce salt and water etc. are spontaneous chemical processes. ( NaOH + HC1 NaCl + H₂0).

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All the best.

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