Pressure

• How to Derive a Thermodynamic Relation from Helmholtz Free Energy
  Starting from Helmholtz free energy, derive pressure and entropy identities and show why (∂U/∂V)T = T(∂P/∂T)V − P.
• How to Calculate Melting and Boiling Points at Different Pressures
  Use the Clausius–Clapeyron equation for boiling points and the Clapeyron equation for melting points, with a reference temperature and phase-change data.