Question

Which of the following statements about the spontaneous reaction occurring in a galvanic cell is always true?

• A. $E_{cell}^o>0,\Delta G^o<0$, and $Q<K$
• B. $E_{cell}^o>0,\Delta G^o<0$, and $Q>K$
• C. $E_{cell}^o>0,\Delta G^o>0$, and $Q>K$
• D. $E_{cell}>0,\Delta G^o<0$, and $Q<K$

Answer 1

The correct option is D $E_{cell}>0,\Delta G^o<0$, and $Q<K$

For a reaction to be spontaneous we have to know that always $\Delta G^0<0$ always.

We know for a galvanic cell,

$\Delta G=-nF{E}_{cell}^0$

So for $\Delta G^0<0$ then $E_{cell}^0>0$.

We know that reaction will be spontaneous $Q<K$

And hence option D is correct answer.