Temperature -- Energy -- Introduction to kinetic theory -- Total energy -- The second law of thermodynamics -- The entropy function -- Probability and information -- Introduction to statistical mechanics -- The relation between statistical mechanics and thermodynamics -- Entropy, information, and energy -- Free-energy functions -- Thermal energy -- Applications of the Gibbs free energy and the Gibbs chemical potential -- Measurement in thermal physics -- Entropy and biology -- Appendix I. Conservation of mechanical energy: general treatment -- Appendix II. The proof of the equivalence of the perfect-gas temperature scale and the absolute thermodynamic temperature scale -- Appendix III. Entropy of a perfect gas -- Appendix IV. Stirling's approximation -- Appendix V. Evaluation of the partition function of a perfect gas.