The E°(M²⁺/M) value for copper is positive (0.34 V). What is a possible reason for this? (Hint: Consider its high ΔH° and low ΔHydH°)
a) Copper has a high enthalpy of atomization
b) Copper has a low enthalpy of hydration
c) Copper has a high ionization energy
d) Copper has a low standard reduction potential
