Given below are two statements related to Ellingham diagram:\ Statement I: Ellingham diagrams can b

Question

Given below are two statements related to Ellingham diagram:\ Statement I: Ellingham diagrams can be constructed for formation of oxides, sulphides and halides of metals.\ Statement II: It consists of plots of $\Delta_f H^{\circ}$ vs T for formation of oxides of elements.

Professor PC Thomas Classes · Answer

Statement I is correct. Statement II is incorrect because an Ellingham diagram plots the Standard Gibbs Free Energy of formation ($\Delta_f G^\circ$) versus temperature, not enthalpy ($\Delta_f H^\circ$).