μ
        =
        
          μ
          
            o
          
        
        +
        k
        ⋅
        T
        ⋅
        log
        ⁡
        (
        γ
        ⋅
        x
        )
        +
        Ω
        ⋅
        σ
      
    
    {\displaystyle \mu =\mu ^{o}+k\cdot T\cdot \log(\gamma \cdot x)+\Omega \cdot \sigma }
  
In this equation μ represents the chemical potential, with μ° being its reference value. T stands for the temperature and k the Boltzmann constant.
Doing this and then rearranging this leads to the expression of the free energy activation (
  
    
      
        Δ
        
          G
          
            †
          
        
      
    
    {\displaystyle \Delta G^{\dagger }}
  ) in terms of the overall free energy of the reaction (
  
    
      
        Δ
        
          G
          
            0
          
        
      
    
    {\displaystyle \Delta G^{0}}
  ).