The thermodynamics properties of Al-Mg solutions at 1000K are:

G^XS= (-18000 + 10000X_Mg - 10X_AlX_Mg (J/mol)

Cp(Al) = 29 J/mol.K

Cp(Mg) = 33 J/mol.K

Cp(Al-Mg) = X_AlCp(Al) + X_MgCp(Mg) J/mol.K

a) What is the type of the solution, explain why.

b) If 1 mole pure liquid Al and 1 mole of pure liquid Mg, each at 1000K, are mixed adiabatically, what will be the final temperature of the solution?

c) What is the entropy change of the process?

d) What are the activities of Al and Mg in the solution?