Ellingham diagrams are plots of ΔGº vs temperature which have applications in metallurgy
2H2 + O2 = 2H2O ΔG(J) = –247500 +55.85 T ........ (I)
2CO + O2 = 2CO2 ΔG(J) = –282400 +86.81 T.......... (II)
The Ellingham diagrams for the oxidation of H2(I) and CO (II) are given below.
The two lines intersect (TE) at 1125 K.
Which of the following is correct ?
I. Δ Gº for reaction (i) is more negative at T < 1125K
II. Δ G° for the reduction of CO is more negative at T < 1125 K
III. H2 is a better reducing agent at T > 1125 K
IV. H2 is a better reducing agent at T < 1125 K
(A) I and II
(B) I and III
(C) III only
(D) I and IV