How do you use steam tables for process calculations?

Steam tables provide properties of water/steam at various conditions. Saturation tables: properties at vapor-liquid equilibrium (T_sat or P_sat given). Superheated tables: properties of vapor above saturation. Compressed liquid tables: subcooled liquid properties. Key properties: specific volume (v), internal energy (u), enthalpy (h), entropy (s). Interpolation for non-tabulated values. Usage: energy balances (using enthalpy), available energy calculations (using entropy), sizing (using volume). For mixtures, use quality (x = m_vapor/m_total): h_mix = h_f + x*h_fg.