Isochore change of state
Isochore is a term used in thermodynamics . It describes a change in state of a substance during which its volume remains constant.
According to Amonton's law (also Gay-Lussac's 2nd law ) or the equation of state of an ideal gas , if the number of particles is also constant for an ideal gas:
It also follows that the relative change in pressure corresponds to the relative change in temperature :
- p 1 : Absolute pressure before the supply of heat
- p 2 : Absolute pressure after the application of heat
- T 1 : temperature before the application of heat
- T 2 : temperature after the application of heat
After the equation of state of an ideal gas does not is work done (no volume change!), According to the first law of thermodynamics ( ) comes with a supplied energy directly into the internal energy through: .
In the pV diagram, an isochoric change in state has a vertical line, since only the pressure changes but not the volume.
See also
Web links
Commons : Isochoric processes - collection of images, videos and audio files
Wiktionary: isochor - explanations of meanings, word origins, synonyms, translations