The Ellingham diagram of a certain metal M is | vedclass

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(D) In an Ellingham diagram,the slope of the line $\Delta G^0$ vs $T$ is given by $\Delta S^0$. $A$ change in the slope of the line indicates a phase

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Melting point and boiling point of metal

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(D) In an Ellingham diagram,the slope of the line $\Delta G^0$ vs $T$ is given by $\Delta S^0$. $A$ change in the slope of the line indicates a phase change of the metal or the oxide. At point $A$,the metal $M$ undergoes a phase change (melting),which leads to an increase in entropy,thus changing the slope. At point $B$,the metal oxide $MO_2$ undergoes a phase change (boiling/vaporization),which further changes the slope. Therefore,points $A$ and $B$ correspond to the melting point and boiling point of the metal/oxide respectively.

The Ellingham diagram of a certain metal $M$ is represented in the figure. The points $A$ and $B$ respectively correspond to:

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