A Gibbs Free Energy Curve is a graph that represents the changes in the Gibbs free energy (G) of a chemical reaction as the reaction progresses. It shows the relationship between the free energy of the system and the extent of the reaction, and is used to determine the spontaneity and equilibrium of a reaction.
A Gibbs Free Energy Curve is related to thermodynamics because it is based on the principles of thermodynamics, specifically the concept of free energy. The curve shows the change in free energy (ΔG) as the reaction proceeds, and this change is a fundamental concept in thermodynamics.
The shape of a Gibbs Free Energy Curve is significant because it indicates the spontaneity and equilibrium of a reaction. A downward sloping curve indicates a spontaneous reaction, while a flat curve indicates equilibrium. A positive or upward sloping curve indicates a non-spontaneous reaction.
A Gibbs Free Energy Curve can be used to predict the direction of a reaction by examining the position of the curve relative to the x-axis. If the curve is below the x-axis, the reaction is spontaneous in the forward direction. If the curve is above the x-axis, the reaction is non-spontaneous in the forward direction and will only occur if energy is added.
Temperature affects a Gibbs Free Energy Curve by shifting its position along the x-axis. As temperature increases, the curve shifts to the right, indicating that the reaction becomes more spontaneous. Conversely, as temperature decreases, the curve shifts to the left, indicating that the reaction becomes less spontaneous.