Use the attached Ellingham Diagram for oxides to solve the following. a) Calculate the equilibrium constant for the reaction 4/3Cr+2Na2O= 2/3Cr2O3+4Na at 800C b) Is it possible for Cr to reduce Fe2O3 ? c) What is the partial oxygen pressure at 800C for the reaction 2Min+ O2=2MnO ? d) What is the entropy change of the reaction Si+O2=SiO2 between temperatures 100C and 1500C ? e) Is it possible for V2O3 to oxidise Mg ? f) What is the partial oxygen pressure for 2Fe+O2=2FeO at 1800C ? 9) Prove your answer in (f) Use the attached Ellingham Diagram for oxides to solve the following. a) Calculate the equilibrium constant for the reaction 4/3Cr+2Na2O= 2/3Cr2O3+4Na at 800C b) Is it possible for Cr to reduce Fe2O3 ? c) What is the partial oxygen pressure at 800C for the reaction 2Min+ O2=2MnO ? d) What is the entropy change of the reaction Si+O2=SiO2 between temperatures 100C and 1500C ? e) Is it possible for V2O3 to oxidise Mg ? f) What is the partial oxygen pressure for 2Fe+O2=2FeO at 1800C ? 9) Prove your answer in (f)