A thorough review of the heat related topics taught in PHYS 1702 is undertaken. This is followed by an introduction to Thermometry. The concept of thermally induced stresses is discussed. The topic of Heat
transfer, which was introduced in PHYS 1702, is further developed. The ideal gas law and the kinetic theory of gases are discussed. The zeroth and first laws of thermodynamics are introduced. The idea of different types of thermal processes is introduced.
Review
Heat and temperature. S.I. units of heat and temperature. Heat capacity, specific heat capacity. States of matter and phase diagrams. Latent heats, specific latent heats. Calorimetry
Thermometry
The Absolute scale of temperature. The Celsius temperature scale. Thermometric properties: thermal expansion, pressure, resistance, thermal radiation, EMF and the Seebeck and Peltier effects. International fixed points. Thermometers: Constant volume gas thermometer. Resistance thermometer, thermistor. thermocouples. Radiation pyrometers. L.C.D.
Thermal stress
Linear expansions in solids. Non-uniform temperature induced stress.
Heat Transfer
(i) Conduction: Fourier’s law of heat conduction, coefficient of thermal conductivity, thermal conductivity in solids, liquids and gases. Thermal conductance. Newton’s law of cooling. Thermal contact conductance.
(ii) Convection: Natural and forced convections. Heat current. Simple examples of convection currents and air circulation in weather. Aerodynamic heating.
(iii) Radiation: Heat transfer by electromagnetic radiation. Stefan-Boltzmann law. Blackbody, black body radiation, emissivity. Wien’s Displacement law. radiant energy,
Gases
Molecular mass, the Mole. Avogadro’s number. Ideal gas law. Boltzmann’a constant. Standard temperature and pressure. Kinetic theory of gases. Root-mean-square speed. Internal energy of monatomic ideal gas.
Thermodynamics
Systems and surroundings. Zeroth law of thermodynamics. First law of thermodynamics. Adiabatic expansion. Thermal Processes: Isobaric process, isochoric process, isothermal process, adiabatic process. Phase diagrams for each of the processes.
Lectures, tutorials, laboratory activities. All lectures will have associated problem solving sessions.
| Module Content & Assessment | |
|---|---|
| Assessment Breakdown | % |
| Formal Examination | 30 |
| Other Assessment(s) | 70 |