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# Vocab Words

### Thermodynamics

TermDefinition
Heat the state of a body perceived as having or generating a relatively high degree of warmth.
Thermal Energy Thermal energy is the part of the total potential energy and kinetic energy of an object or sample of matter that results in the system temperature.
Macroscopic visible to the naked eye
Microscopic so small as to be invisible or indistinct without the use of the microscope
Tempature a measure of the warmth or coldness of an object or substance with reference to some standard value. The temperature of two systems is the same when the systems are in thermal equilibrium.
Thermodynamics the science concerned with the relations between heat and mechanical energy or work, and the conversion of one into the other: modern thermodynamics deals with the properties of systems for the description of which temperature is a necessary coordinate.
Heat Resivior a hypothetical body of infinitely large mass capable of absorbing or rejecting unlimited quantities of heat without undergoing appreciable changes in temperature, pressure, or density.
Conduction the transfer of heat between two parts of a stationary system, caused by a temperature difference between the parts.
Radiation the process in which energy is emitted as particles or waves.
Entropy a function of thermodynamic variables, as temperature, pressure, or composition, that is a measure of the energy that is not available for work during a thermodynamic process. A closed system evolves toward a state of maximum entropy.
Radiant Heating the means of heating objects or persons by radiation in which the intervening air is not heated.
Thermal Expansion Thermal expansion is the tendency of matter to change in volume in response to a change in temperature.
Absolute Tempature as measured on a scale in which the hypothetical lowest limit of physical temperatures is assigned the value zero
Heat Engine a mechanical device designed to transform part of the heat entering it into work
Order and Disorder designate the presence or absence of some symmetry or correlation in a many-particle system
Heat Exchange Heat exchange may refer to: Heat transfer, an area of engineering concerned with the transfer of thermal energy
Geothermal of or pertaining to the internal heat of the earth.
Thermal Equilibrium the common parlance of the ordinary language of physical discourse, and sometimes as a specialized technical term in thermodynamics.
Specific Heat the number of calories required to raise the temperature of 1 gram of a substance 1°C, or the number of BTU's per pound per degree F
Coefficient of Restitution the ratio of the relative velocity after impact to the relative velocity before the impact of two colliding bodies, equal to 1 for an elastic collision and 0 for an inelastic collision.
Pressure the exertion of force upon a surface by an object, fluid, etc., in contact with it: the pressure of earth against a wall.
Kinetic Engery the energy of a body or a system with respect to the motion of the body or of the particles in the system
Potential Energy the energy of a body or a system with respect to the position of the body or the arrangement of the particles of the system.
Convection the transfer of heat by the circulation or movement of the heated parts of a liquid or gas.
Latent Heat heat absorbed or radiated during a change of phase at constant temperature and pressure.
Phase Change a change from one state (solid or liquid or gas) to another without a change in chemical composition
Created by: Amanda_Kellis
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