Which of the following statements is INCORRECT regarding the Ellingham diagram?
The Ellingham diagram plots Gibbs free energy change as a function of temperature.
The Ellingham diagram assumes all reactants and products are in their standard states.
The Ellingham diagram can be used to determine the rate of a reaction.
The slope of the lines in the Ellingham diagram is determined by the entropy change of the reaction.
Related Questions
The Ellingham diagram plots the change in which thermodynamic quantity against temperature?
Gibbs Free Energy
Enthalpy
Entropy
Internal Energy
Which of the following is NOT a limitation of the Ellingham diagram?
It doesn't show the effect of pressure on the reaction.
It assumes that the reactants and products are in their standard states.
It doesn't provide information about the kinetics of the reaction.
It doesn't account for the formation of solutions between metals and oxides.
Which of the following statements is INCORRECT regarding the Ellingham diagram?
The Ellingham diagram plots Gibbs free energy change as a function of temperature.
The Ellingham diagram assumes all reactants and products are in their standard states.
The Ellingham diagram can be used to determine the rate of a reaction.
The slope of the lines in the Ellingham diagram is determined by the entropy change of the reaction.
Based on the Ellingham diagram, which metal is the most suitable reducing agent for alumina () at a temperature of 1000°C?
Zn
Fe
Mg
Cu
For the reaction , the Ellingham diagram shows a negative slope. This is primarily because:
The number of gaseous molecules increases during the reaction.
The reaction is exothermic.
Carbon is a good reducing agent.
Carbon monoxide is a stable gas.
The Ellingham diagram for the formation of metal oxides shows a sudden increase in the slope for some metals. This is primarily due to:
Melting of the metal
Boiling of the metal
Phase transition of the metal
Formation of a non-stoichiometric oxide
According to the Ellingham diagram, which of the following metals cannot be used to reduce alumina ()?
Mg
Ca
Cu
Na
Consider the Ellingham diagram. Which metal oxide among the following can be reduced by coke at a temperature of 1500 K but not at 1200 K?
MgO
Al₂O₃
ZnO
FeO
Using the Ellingham diagram, predict the approximate temperature above which magnesium can reduce alumina ().
1000°C
1600°C
2000°C
2500°C
Ellingham diagrams are particularly useful for understanding the:
Reduction of metal oxides.
Oxidation of metals.
Neutralization reactions.
Solubility of salts.
