(3) Calculate K for the following reaction at 298K and 1.01325105Pa(1atm) : SnO(s)+CO2(g)SnO2(s)+CO(g) given the following data: 2Sn(s)+O2(g)2SnOs)Sn(s)+O2(g)SnO2(s)C(s)+O2(g)CO2(g)2C(s)+O2(g)2CO(g)G298=514kJG298=520kJG298=395kJG298=274kJ (4) Deduce, by calculation of G, whether the smelting of aluminium oxide, according to the reaction: Al2O3(s)+3C(s)2Al(l)+3CO(g)G1773=+150kJ is feasible at 1500C if a vacuum unit provides a pCO value of 1103atm