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Units, Constants and Useful Formulas
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Last modified: January 26, 2018
Gas Laws
----------
Dalton's law:
Dalton's Law of Partial Pressures states that the total pressure of a
mixture of nonreacting gases is the sum of their individual partial
pressures.
PT = P1 + P2 + P3 + ...
Boyle's Law:
P ∝ 1/V for contant T and amount of gas.
∴ P1V1 = k = P2V2
Charles' Law:
V ∝ T for constant P and amount of gas.
∴ V/T = k
V1/T1 = k = V2/T2
Gay-Lussac's Law:
P ∝ T for constant V and amount of gas.
∴ P/T = k
P1/T1 = k = P2/T2
Avogadro's Law:
V ∝ n n is measured in moles for constant T and P.
∴ V/n = k
V1/n1 = k = V2/n2
The Combined (Universal) Gas Law:
The combination of the above laws yields:
P1V1/T1 = P2V2/T2 for a constant amount of gas.
This can also be seen from the Ideal Gas Law PV/T = nR