AP Classroom for Chemical Thermodynamics | 2025 LATEST UPDATED |
COMPLETE SET QUESTIONS WITH 100% RATED CORRECT
ANSWERS
The table above lists the equilibrium constants and changes in thermodynamic properties for the
dissolution of FeCO3 and MnCO3 at 25°C. The two particle diagrams below represent saturated
solutions of each compound at equilibrium.Which of the following explains which of the
properties listed in the table is best represented by the particle diagram? - (answers)D. The
particle diagrams best represent that the molar solubility is greater for FeCO3 compared to
MnCO3.
The particle diagrams for these saturated solutions represent the relative magnitudes of their
molar solubility by showing that吗？还是指某个特定的词或概念
the dissolution of FeCO3 favors, if only slightly, the release of
ions in solution. ？
2Fe2O3(s)+3C(s)→4Fe(s)+3CO2(g)
In a blast furnace, the reaction represented above occurs, producing Fe(s) from its ore, Fe2O3(s).
The reaction is thermodynamically favorable and based on coupling the two reactions
represented below.
2Fe2O3→4Fe+3O2
C+O2→CO2
Which of the following identifies a limitation in how the representations above describe a system
of coupled reactions? - (answers)C. The values of ΔG° for each reaction are not shown.
In a coupled pair of reactions, the thermodynamic favorability of each component reaction and
the overall reaction is central to the understanding of how coupled reactions work. In this case
the blast furnace reaction is favorable because it is a combination of the unfavorable
decomposition of iron oxide into its elements (ΔG°>0) and the favorable combustion of carbon
to form carbon dioxide (ΔG°<0).
At 298K, NH4NO3 readily dissolves in water, suggesting that the change in free energy (ΔG)
favors the dissolution process. However, when NH4NO3 dissolves in water, the temperature of
COMPLETE SET QUESTIONS WITH 100% RATED CORRECT
ANSWERS
The table above lists the equilibrium constants and changes in thermodynamic properties for the
dissolution of FeCO3 and MnCO3 at 25°C. The two particle diagrams below represent saturated
solutions of each compound at equilibrium.Which of the following explains which of the
properties listed in the table is best represented by the particle diagram? - (answers)D. The
particle diagrams best represent that the molar solubility is greater for FeCO3 compared to
MnCO3.
The particle diagrams for these saturated solutions represent the relative magnitudes of their
molar solubility by showing that吗？还是指某个特定的词或概念
the dissolution of FeCO3 favors, if only slightly, the release of
ions in solution. ？
2Fe2O3(s)+3C(s)→4Fe(s)+3CO2(g)
In a blast furnace, the reaction represented above occurs, producing Fe(s) from its ore, Fe2O3(s).
The reaction is thermodynamically favorable and based on coupling the two reactions
represented below.
2Fe2O3→4Fe+3O2
C+O2→CO2
Which of the following identifies a limitation in how the representations above describe a system
of coupled reactions? - (answers)C. The values of ΔG° for each reaction are not shown.
In a coupled pair of reactions, the thermodynamic favorability of each component reaction and
the overall reaction is central to the understanding of how coupled reactions work. In this case
the blast furnace reaction is favorable because it is a combination of the unfavorable
decomposition of iron oxide into its elements (ΔG°>0) and the favorable combustion of carbon
to form carbon dioxide (ΔG°<0).
At 298K, NH4NO3 readily dissolves in water, suggesting that the change in free energy (ΔG)
favors the dissolution process. However, when NH4NO3 dissolves in water, the temperature of
