Chapter 3 Energy concepts and First Law, of the course:
Thermodynamics for Engineers

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3 Energy concepts and First Law

  1. General definitions for energy and mechanical power
    2. Abstract definition of energy; enumeration of common forms; energy level; crossing versus stored energies; Conditions for a quantity to be labelled as mechanical power or work; sign conventions; classification of work according to force types Power point: English text: 3_Energy_1_Definitions
    Video lecture: English text & narration - English text+Arabic narration
  2. Work of point forces
    3. Power through transmission devices; relation between work and potential and kinetic energies; work due to elastic forces; work due to electric field
    Power point: English text: 3Energy_2_Work_point_forces
    Video lecture: English text & narration - English text+Arabic narration
  3. Work of distributed force
    4. Power and work of surface stresses; work of changing volume; dependence on process; work in non-equilibrium processes; flow work and useful work of an open system; the so-called friction work; Work due to surface tension forces
    Power point: English text: 3_Energy_3_Work_distributed_forces
    Video lecture: English text & narration - English text+Arabic narration
  4. Internal energy (qualitative) and heat
    5. Contribution of kinetic energy of Brownian molecular movements in internal energy; contribution of potential energy due to intermolecular forces; contribution of chemical and nuclear stored energies in molecules and atoms; Definition of thermal power and heat; heat exchanged is process dependent; distinguishing between heat and internal energy
    Power point: English text: 3_Energy_4_Internal_energy_heat
    Video lecture: English text & narration - English text+Arabic narration
  5. First Law of thermodynamics
    6. First Law statement; First Law for a closed system undergoing a cycle; Internal energy; First Law for a process in a closed system; general forms and enthalpy
    Power point: English text: 3_Energy_5_First_Law
    Video lecture: English text & narration - English text+Arabic narration
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