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The second (symbol: s) (abbreviated s or sec) is the base unit of time in the International System of Units (SI).
The Second Law of Thermodynamics The content and the pictures are from the text book: Ãengel, Y. A. and Boles, M. A., âThermodynamics: An Engineering Approach,â McGraw-Hill, New York, 6th Ed., 2008 Objectives â¢ Introduce the second law of thermodynamics. â¢ Identify valid processes as those that satisfy both the first and second laws of thermodynamics. â¢ Discuss thermal energy reservoirs, reversible and irreversible processes, heat engines, refrigerators, and heat pumps. â¢ Describe the KelvinâPlanck and Clausius statements of the second law of thermodynamics. â¢ Discuss the concepts of perpetual-motion machines. â¢ Apply the second law of thermodynamics to cycles and cyclic devices. â¢ Apply the second law to develop the absolute thermodynamic temperature scale. â¢ Describe the Carnot cycle.