The correct ΔG for the cell reaction involving steps
Zn(s) → Zn2+ (aq) + 2e-
Cu2+ (aq) + 2e- → Cu (s)
is
1
ΔG° - RT In \(\frac{{}^azn^{2+}}{{}^aCU^{2+}}\)
2
ΔG° + RT In \(\frac{{}^azn^{2+}}{{}^aCU(s)}\)
3
ΔG° - RT In \(\frac{{}^azn(s)}{{}^aCU^{2+}}\)
4
ΔG° + RT In \(\frac{{}^azn^{2+}}{{}^aCU^{2+}}\)