The combined gas law
<h3>Further explanation </h3>
There are several gas equations in various processes:
In the same temperature and pressure, in the same volume conditions, the gas contains the same number of molecules
So it applies: the ratio of gas volume will be equal to the ratio of gas moles
<h3>V1: V2 = n1: n2 </h3>
At a fixed temperature, the gas volume is inversely proportional to the pressure applied
<h3>p1.V1 = p2.V2 </h3>
When the gas pressure is kept constant, the gas volume is proportional to the temperature
<h3>V1 / T1 = V2 / T2 </h3>
When the volume is not changed, the gas pressure in the tube is proportional to its absolute temperature
<h3>P1 / T1 = P2 / T2 </h3>
- 5. Law of Boyle-Gay-Lussac
Combined with Boyle's law and Gay Lussac's law
<h3>P1.V1 / T1 = P2.V2 / T2 </h3>
P1 = initial gas pressure (N / m2 or Pa)
V1 = initial gas volume (m3)
P2 = gas end pressure
V2 = the final volume of gas
T1 = initial gas temperature (K)
T2 = gas end temperature
Can be concluded
Boyle's law at constant T, P = 1 / V ⇒PV = k
Charles's law, at constant P, V = T ⇒V/T = k
Gay Lussac's Law , constant V, P=T⇒P/T = k
Avogadro's law, at constant P and T, V = n
So an equation for the combined gas law :
Become the general ideal gas equation
PV = nRT
PV = NkT
N = number of gas particles
n = number of moles
R = gas constant (8,31.10³ J / kmole K
k = Boltzmann constant (1,38.10⁻²³)
n = = N / No
n = m / M
n = mole
No = Avogadro number (6.02.10²³)
m = mass
M = relative molecular mass
Absolute zero point of the Kelvin scale can better indicate the condition of a substance that has frozen, so the Kelvin scale is always positive and easy to calculate
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Learn more
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Keywords : ideal gas law,the combined gas law,Kelvin scale