In an Ellingham diagram, a reaction with a negative slope indicates:
The reaction becomes more spontaneous at higher temperatures.
The reaction becomes less spontaneous at higher temperatures.
The reaction is independent of temperature.
The entropy change is zero.
Related Questions
A sudden change in the slope of a line in an Ellingham diagram indicates:
A phase change in the metal or its oxide.
A change in the reaction mechanism.
A change in pressure.
A change in concentration.
In an Ellingham diagram, a line with a more negative slope than another indicates:
A larger increase in entropy during the reaction.
A smaller increase in entropy during the reaction.
A more negative enthalpy change for the reaction.
A less negative enthalpy change for the reaction.
In an Ellingham diagram, a reaction with a negative slope indicates:
The reaction becomes more spontaneous at higher temperatures.
The reaction becomes less spontaneous at higher temperatures.
The reaction is independent of temperature.
The entropy change is zero.
Which method of purification is represented by the following equation:
Zone refining
Cupellation
Polling
Van Arkel
Which metal, among the following, has the greatest potential to reduce alumina () based on the Ellingham diagram, considering the most negative Gibbs free energy change for the overall reduction process?
Mg
Fe
Zn
Ca
The Ellingham diagram predicts the feasibility of reduction of metal oxides by:
Comparing the relative positions of the lines for the metal oxide and the reducing agent.
Calculating the exact value of the equilibrium constant for the reaction.
Determining the activation energy for the reduction reaction.
Measuring the enthalpy change of the reaction.
In zone refining method, the molten zone :
contains impurities
contains puri๏ฌed metal only
contains more impurity than the original
moves to either side
What does a line with a positive slope on an Ellingham diagram represent?
An increase in entropy
A decrease in entropy
An increase in enthalpy
A decrease in enthalpy
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.
The Ellingham diagram plots the change in which thermodynamic quantity against temperature?
Gibbs Free Energy
Enthalpy
Entropy
Internal Energy
