The work done in a galvanic cell is equal to which of the following?

Identify which of the following cell reactions is spontaneous under standard state conditions.

For the cell reaction,$Zn + Cu^{2+} \to Zn^{2+} + Cu,$ the cell representation is:

Calculate $\Delta_r G^o$ for the cell reaction:
$Zn_{(s)} + Cu^{2+}_{(aq)} \to Zn^{2+}_{(aq)} + Cu_{(s)}$
Given: $E^o_{Cu^{2+}/Cu} = 0.34 \, V, E^o_{Zn^{2+}/Zn} = -0.76 \, V$

Which of the following hot aqueous solutions is used to dip carbon rods of $H_2 - O_2$ fuel cell?

When does an electrochemical cell behave as an electrolytic cell?