For a reaction ,
the free energy change is plotted as a function of temperature. The temperature below which the oxide is stable could be inferred from the plot as the point at which:

Question

For a reaction , 
the free energy change is plotted as a function of temperature. The temperature below which the oxide is stable could be inferred from the plot as the point at which:

Canvas Classes · Accepted Answer

Strategy:
 Stability of a compound (like an oxide) is determined by the sign of the Gibbs free energy change () for its formation reaction. If , the compound is thermodynamically stable; if , it becomes unstable relative to its elements.

Step 1: Analyze the stability condition
For the reaction :
- The oxide  is stable when the forward reaction is spontaneous ().
- As temperature changes, if  increases and crosses the zero line (x-axis), the oxide loses its stability.

Step 2: Interpret the plot

More questions from Thermodynamics