Thermodynamic
Thermodynamics
Thermodynamics (pronounced: ther-mo-dy-nam-ics) is a branch of physics that deals with heat, work, and temperature, and their relation to energy, radiation, and physical properties of matter. The behavior of these quantities is governed by the four laws of thermodynamics which convey a quantitative description using measurable macroscopic physical quantities.
Etymology
The term "thermodynamics" comes from the Greek words "therme" meaning heat and "dynamis" meaning power. It was first used in a publication by William Thomson (Lord Kelvin) in 1854.
Related Terms
- Energy: In the context of thermodynamics, energy can be defined as the capacity to do work or produce heat.
- Heat: Heat is a form of energy that is transferred by a difference in temperature.
- Work (physics): In thermodynamics, work performed by a system is the energy transferred by the system to its surroundings.
- Temperature: Temperature is a physical quantity that expresses hot and cold. It is the manifestation of thermal energy, present in all matter, which is the source of the occurrence of heat, a flow of energy, when a body is in contact with another that is colder.
- Laws of Thermodynamics: These are four principles of thermodynamics that describe how thermal energy is converted to and from other forms of energy and how it affects matter.
- Entropy: In thermodynamics, entropy is often associated with the amount of order, disorder, or chaos in a thermodynamic system.
- Enthalpy: In thermodynamics, the term enthalpy refers to the total heat content of a system.
- Thermal Energy: Thermal energy refers to the internal energy present in a system due to its temperature.
External links
- Medical encyclopedia article on Thermodynamic
- Wikipedia's article - Thermodynamic
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