Heat

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Heat

Description

Heat is a form of energy [J]. The relationship between heat and work provides the foundation of thermodynamics, which describes transformations from an initial to a final state of a system. In energy transformations heat may pass through the boundary of the system, at an external heat flow of deQ/dt.

Abbreviation: Q, Qth [J]

Reference: Energy

Communicated by Gnaiger E (2019-01-05) last update 2020-11-25

Symbol Q

To distinguish Q in thermodynamics and electricity, Qth [J] is used for heat, and Qel [C] for charge.


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Units
  • Joule [J]; 1 J = 1 NΒ·m = 1 VΒ·C; 1 cal = 4.184 J
Fundamental relationships
Β» Energy
Β» Exergy
Β» Extensive quantity
Contrast
Β» Force
Β» Pressure
Β» Intensive quantity
Forms of energy
Β» Internal-energy dU
Β» Enthalpy dH
Β» Heat deQ
Β» Bound energy dB
Forms of exergy
Β» Helmholtz energy dA
Β» Gibbs energy dG
Β» Work deW
Β» Dissipated energy diD



MitoPedia concepts: Ergodynamics 

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