Thermodynamics and Heat Transfer Exam Questions and Answers

Heat - ANSWER-Energy in transit due to a temperature difference between the source from which the energy is coming and a sink toward which the energy is going. Thermal Energy - ANSWER-Heat energy Macroscopic - ANSWER-Large enough to be visible to the naked eye Microscopic - ANSWER-too small to be seen except under a microscope Temperature - ANSWER-A measure of how hot (or cold) something is; specifically, a measure of the average kinetic energy of the particles in an object. Thermodynamics - ANSWER-Deals with the relations ship of heat transfer between other forms of energy. Study of the effects of work, heat and energy on a system. The transfer of energy through heat. The way heat is used as an energy resource Heat Reservoir - ANSWER-a system which is able to receive or lose any amount of heat without a change in temperature Conduction - ANSWER-Form of heat transfer where heat energy is directly transferred between molecules through molecular collisions or direct contact. Latent Heat - ANSWER-heat absorbed or radiated during a change of phase at a constant temperature and pressure Phase Change - ANSWER-A change from one state (solid or liquid or gas) to another without a change in chemical composition Entropy - ANSWER-(thermodynamics) a thermodynamic quantity representing the amount of energy in a system that is no longer available for doing mechanical work Radiant Heating - ANSWER-heating a building by radiation from panels containing hot water or electrical heaters Thermal Expansion - ANSWER-An increase in the size of a substance when the temperature is increased Absolute Temperature - ANSWER-This is a temperature reading made relative to absolute zero. We use the unit of Kelvins for these readings. Heat Engine - ANSWER-a device that converts thermal energy into mechanical energy