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Question: Answered & Verified by Expert
Cell reaction is spontaneous, when
ChemistryElectrochemistryMHT CETMHT CET 2008
Options:
  • A $E_{\text {red }}^{\circ}$ is negative
  • B $E_{\mathrm{red}}^{\circ}$ is positive
  • C $\Delta G^{\circ}$ is negative
  • D $\Delta G^{\circ}$ is positive
Solution:
1080 Upvotes Verified Answer
The correct answer is: $\Delta G^{\circ}$ is negative
$\Delta G=\Delta H-T \Delta S$
For a spontaneous celll reaction, $\Delta H$ should be negative and $\Delta S$ should be positive. Hence, $\Delta G$ should be negative.

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