A standard voltaic cell is constructed so that the overall cell reaction is

2Al+3(aq) + 3M(s) --> 3M+2(aq) + 2Al(s)

where M is an unknown metal.
If ∆G⁰= -411 kJ for the overall cell reaction, identify the metal used to construct the standard cell.

This in not my area of expertise, but listing the subject may help you get an answer sooner.