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samenvatting fysica miv wiskunde: temperatuur en warmte

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Samenvatting van de powerpoints van dit hoofdstuk voor het vak fysica miv wiskunde

Institution
Universiteit Antwerpen (UA)
Course
Fysica M.i.v. Wiskunde (1005FBDBMW)








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Institution
Universiteit Antwerpen (UA)
Study
Biomedische Wetenschappen
Course
Fysica M.i.v. Wiskunde (1005FBDBMW)
All documents for this subject (35)

Document information

Uploaded on
February 9, 2022
Number of pages
4
Written in
2020/2021
Type
Summary

Subjects

  • fysica miv wiskunde
  • biomedische wetenschappen
  • temperatuur en warmte
  • universiteit antwerpen

Content preview

Fysica miv wiskunde: fysica – TEMPERATUUR EN WARMTE


Temperatuur en warmte
Temperatuur
 Kelvin als SI eenheid
 Voorwerpen gaan klein beetje uitzetten als temperatuur stijgt

Thermische uitzetting
∆L
Lineaire uitzetting  α =
L0 ∆ T
∆S
Vlakke uitzetting  γ = 2 α =
S 0 ∆T
∆V
Kubieke uitzetting  β=3 α =
V0∆T
 Uitzondering bij water! Volume daalt bij hogere temperatuur en volume stijgt bij
lagere temperatuur!


Toestandsvergelijking van een gas
Ideaal gas
 Kleine dichtheid
 Verwaarloosbaar volume van moleculen
 Temperatuur voldoende hoog
 Volume bij 1 atm en 273 K = 22,4 L
 pV = nRT

Toestandsvergelijking van Van der Waals
Van der Waals gas
 Reële gassen met grote dichtheid
 Volume van moleculen niet verwaarloosbaar
o beschikbare volume verkleint (door volume andere moleculen)  covolume
o p(V – nb) = n.R.T
 Belangrijke aantrekkingskracht tussen moleculen
o Moleculen worden tegengehouden door eigen molecule
o Kracht en druk op wand kleiner


Warmtecapaciteit
Soortelijke warmte – warmtecapaciteit
Hoeveelheid warmte nodig om 1 kg stof 1K (of 1°C) in temperatuur te doen stijgen.
dQ
 c=
mdT

Molaire warmtecapaciteit
Hoeveelheid warmte om 1 mol stof met 1K te doen stijgen.




Temperatuur en warmte
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