A spontaneous process is:
Correct answer: D. All of the above
- A. Unidirectional and irreversible
- B. Irreversible and a real process
- C. Unidirectional and a real process
- D. All of the above
Explanation
A is incorrect because spontaneous process is also real processB is incorrect because spontaneous process is also unidirectionalC is incorrect because spontaneous process is also irreversible processD is correct because spontaneous process is a process which takes place on its own without any outside assistance. It is unidirectional, irreversible and a real process.
This question appeared on the UHS MDCAT 2010 paper, which you can sit online with every answer explained.
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About System, Surroundings and State Functions
A system is the part of the universe under study, while everything outside it is the surroundings; the boundary separates them. State functions such as pressure, temperature, volume, internal energy and enthalpy depend only on the state, unlike heat and work, which depend on the path taken.
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