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Week 2 Warmte & Gasdynamica
De ideale gaswet
H17 Temperatuur, thermische expansie en de ideale gaswet
The gas laws and absolute temperature
The volume of a gas depends very much on the pressure as well as on the temperature. The
relationship between them is called an equation of state, if the state of a system is changed we will
always wait until the pressure and temperature have reached the same values throughout. We thus
consider only equilibrium states of a system - when the variables that describe it (temperature and
pressure) are the same throughout the system and are not changing in time ;
The volume of a gas is inversely proportional to the absolute pressure applied to it when the
temperature is kept constant :
Oftewel PV = constant. This relation is is known as Boyle’s law.
Absolute zero = -273,15 graden Celsius
The volume of a given amount of gas is directly proportional to the absolute temperature when the
pressure is kept constant, this is known as Charles’s law :
Week 2 Warmte & Gasdynamica 1
, At a constant volume, the absolute pressure of a gas is directly proportional to the absolute
temperature, this is known as the Gay-Lussac’s law :
The ideal gas law
Er horen wel verschillende aannames bij het gebruiken van bovenstaande formule voor de ideale
gaswet :
Er vindt geen faseovergang plaats
P, p niet te hoog
P = Pabs = absolute druk
P = P0 + Pmanometer
P = 1,00 atm + Pmano = 1,013 x 10^5 N/m2 + Pmano
PV is directly proportional to mT
Week 2 Warmte & Gasdynamica 2
Week 2 Warmte & Gasdynamica
De ideale gaswet
H17 Temperatuur, thermische expansie en de ideale gaswet
The gas laws and absolute temperature
The volume of a gas depends very much on the pressure as well as on the temperature. The
relationship between them is called an equation of state, if the state of a system is changed we will
always wait until the pressure and temperature have reached the same values throughout. We thus
consider only equilibrium states of a system - when the variables that describe it (temperature and
pressure) are the same throughout the system and are not changing in time ;
The volume of a gas is inversely proportional to the absolute pressure applied to it when the
temperature is kept constant :
Oftewel PV = constant. This relation is is known as Boyle’s law.
Absolute zero = -273,15 graden Celsius
The volume of a given amount of gas is directly proportional to the absolute temperature when the
pressure is kept constant, this is known as Charles’s law :
Week 2 Warmte & Gasdynamica 1
, At a constant volume, the absolute pressure of a gas is directly proportional to the absolute
temperature, this is known as the Gay-Lussac’s law :
The ideal gas law
Er horen wel verschillende aannames bij het gebruiken van bovenstaande formule voor de ideale
gaswet :
Er vindt geen faseovergang plaats
P, p niet te hoog
P = Pabs = absolute druk
P = P0 + Pmanometer
P = 1,00 atm + Pmano = 1,013 x 10^5 N/m2 + Pmano
PV is directly proportional to mT
Week 2 Warmte & Gasdynamica 2
