MCQ
Which one of the following process is non $-$ spontaneous?
- ADissolution of $\ce{CuSO_4}$ in water
- BReaction of $\ce{H_2}$ and $\ce{O_2}$ to form water
- CWater flowing down hill
- ✓Flow of electric current from low potential to high potential
✓
Answer
Correct option: D.
Flow of electric current from low potential to high potential
The physical or chemical processes which do not proceed by its own in a particular direction and requires outside help is called a non $-$ spontaneous process. Therefore, flow of heat from a cold body to a hot body is a non $-$ spontaneous process as it requires external work as per Clausius.
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