The foundation of classical thermodynamics including the zeroth law and definition of temperature, the first law, work heat and internal energy. carnot cycle and the second law; entropy and irreversibility, thermodynamic potentials and the maxwell relations. Applications; Qualitative discussion of phase transition, third law of thermodynamics, idea and real gases. Elementary kinetci theory of gases including Boltzman counting Maxwell Boltzman law of distribution of velocities, simple applications of the distribution law.