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Why does the vs. T curve for the formation of from have a negative slope in the Ellingham diagram?
Increase in entropy due to increase in gaseous moles.
Decrease in entropy due to decrease in gaseous moles.
Constant entropy as gaseous moles remain the same.
The reaction is exothermic.
The adsorption of a gas on a solid surface exhibits a decrease in enthalpy. Which of the following statements is FALSE regarding this process?
Adsorption is generally an exothermic process
ΞG (Gibbs free energy change) is negative
ΞS (entropy change) is negative
ΞS (entropy change) is positive
Adsorption of gases on solid surface is generally exothermic because:
Entropy increases
Enthalpy increases
Free energy increases
Entropy decreases
In an Ellingham diagram, the slope of the line for the formation of a metal oxide is positive. This indicates that:
The entropy change for the reaction is negative.
The reaction becomes less spontaneous at higher temperatures.
The free energy change becomes more negative at higher temperatures.
The enthalpy change for the reaction is positive.
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.
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.
Which of the following properties is NOT a characteristic of living organisms?
Growth and development
Response to stimuli
Entropy always decreases
Adaptation through evolution
If liquids A and B form an ideal solution, the
Enthalpy of mixing is zero
Entropy of mixing is zero
Free energy of mixing is zero
Free energy as well as the entropy of mixing are each zero