Question

njan athin onnum paranjilallo.

explain ellingham diagram in ur own words

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Answer 1

Answer:

An Ellingham diagram is a graph showing the temperature dependence of the stability of compounds. This analysis is usually used to evaluate the ease of reduction of metal oxides and sulfides

Explanation:

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Answer 2

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Question :-

Explain ellingham diagram.

Answer :-

• Ellingham diagram is a plot between ΔfGo and T for the formation of oxides of metals. A general reaction expressing oxidation is given by:

2xM(s) + O2(g) → 2MxO(s)

As is evident from the reaction, the gaseous amount of reactant is decreasing from left to right as the product formed is solid metal oxide on the right side. Hence, we can say that molecular randomness is also decreasing from left to right. Thus, ΔS is negative and ΔG shifts towards higher side despite rising T. Hence, for most of the reactions shown above for the formation of MxO (s), the curve is positive.

• Except for the processes in which change of phase takes place, each plot is a straight line. This temperature at which change of phase takes place is indicated by a positive increase in the slope. For example, the melting is indicated by an abrupt change in the curve in Zn, ZnO plot.

• The metal oxide (MxO) is stable at the point in a curve below which ΔG is negative. Above this point, the metal oxide is unstable and decomposes on its own.

• Feasibility of reductions of the oxide of the upper line by the element represented by the lower line is determined by the difference in the two ΔrG0 values after the point of intersection in the Ellingham diagram.

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