THERMODYNAMIC FREE ENERGY Meaning and
Definition
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Thermodynamic free energy refers to the measure of the potential energy within a system that is available to do useful work. It is denoted by the symbol "G" and is a concept within the field of thermodynamics, which studies the relationship between energy, temperature, and entropy in physical systems.
The thermodynamic free energy is a comprehensive parameter that encompasses both the internal energy of a system and the entropy involved. It represents the maximum work that can be obtained from a given system at constant temperature and pressure, with all other factors being equal. This is known as the maximum reversible work, as any work obtained beyond this limit would result in an increase in the system's entropy.
The thermodynamic free energy can be understood in terms of the balance between two factors: the system's internal energy and its disorder, or entropy. It reflects the measure of the energy available to drive spontaneous processes and is therefore crucial in determining the feasibility and directionality of chemical reactions and physical processes.
In most cases, a decrease in the value of the thermodynamic free energy indicates a favorable change, as it implies an increase in the system's stability and likelihood to undergo spontaneous reactions. However, it is essential to note that the thermodynamic free energy alone cannot predict the rate at which a process will occur, as it does not account for kinetic factors such as activation energy and reaction rates.
