For the electrochemical cell Pt(s) | H2(1 atm) | H+(1 M) || Cu2+(1 M) | Cu(s), which one of the following changes will cause an increase in the cell voltage?
◦ Lower the H2(g) pressure.
◦ Increase the size/mass of the copper electrode.
◦ Lower the H+(aq) concentration.
◦ Decrease the concentration of Cu2+ ion.
◦ None of the above.