Thermodynamic variable

In exact differentials. Below are some examples of state variables:

• Density (ρ)
• Energy (E)
• Helmholtz free energy (A)
• Gibbs free energy (G)
• Enthalpy (H)
• Internal energy (U)
• Mass (m)
• Pressure (p)
• Entropy (S)
• Temperature (T)
• Volume (V)
• The amounts of each of the molecules