Thermodynamics
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 for doing work.
- 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.
- Entropy: In thermodynamics, entropy is commonly associated with the amount of order, disorder, or chaos in a thermodynamic system.
- Laws of Thermodynamics: The four laws of thermodynamics define fundamental physical quantities (temperature, energy, and entropy) that characterize thermodynamic systems at thermal equilibrium.
See Also
External links
- Medical encyclopedia article on Thermodynamics
- Wikipedia's article - Thermodynamics
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