What is the physical significance of free energy?

Explanation

To understand the physical significance of free energy, we can break down the explanation into several key steps:

### Step 1: Understanding Free Energy
Free energy, represented as ΔG, is defined by the equation:
\[ ΔG = ΔH - TΔS \]
where:
- \( ΔG \) = change in free energy
- \( ΔH \) = change in enthalpy (total heat content)
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