10) How many kilojoules are released when 125g of Cl2 reacts with silicon? Si(s)+2Cl2(g)SiCl4(g)H=657kJ579kJ 11) How many kilojoules are absorbed when 278g of PCl5 reacts? PCl5(g)PCl3(g)+Cl2(g)H=+67.0kJ+89.5kJ 12) Calculate the energy change for the reaction: Fe2O3(s)+CO(g)2FeO(s)+CO2(g) Given the following: Fe2O3(s)+3CO(g)2Fe(s)+3CO2(g)FeO(s)+CO(g)Fe(s)+CO2(g)H=1.6kJH=23.4kJH=10.9kJ 13) Calculate the energy change for the reaction: 3C(s)+4H2(g)C3H8(g) Given the following: C3H8(g)+5O2(g)3CO2(g)+4H2O(g)C(s)+O2(g)CO2(g)2H2(g)+O2(g)2H2O(g)H=2,043kJH=393.5kJH=483.6kJ H=105kJ