The course covers an introduction to thermal sciences with an emphasis on the first and second laws of thermodynamics, energy and energy transfer, energy conversion efficiencies, properties of pure substances, real gases and the ideal-gas equation of state, energy analysis of closed systems, conservation of mass, irreversibility, and availability. Moreover, thermodynamic properties and cycles and entropy production, entropy change of liquid, solid and ideal gas, ideal gas processes, steady state, steady flow processes, power and refrigeration cycles. The Carnot cycle is introduced along with several cyclic devices or systems which include heat engines, refrigerators, heat pumps, and air conditioners.