what is the formula of partial pressure in terms of moles
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Answer:
The total pressure of a mixture of gases can be defined as the sum of the pressures of each individual gas:
P
t
o
t
a
l
=
P
1
+
P
2
+
…
+
P
n
.
The partial pressure of an individual gas is equal to the total pressure multiplied by the mole fraction of that gas.
Boyle’s Law and the Ideal Gas Law tell us the total pressure of a mixture depends solely on the number of moles of gas, and not the kinds of molecules; Dalton’s Law allows us to calculate the total pressure in a system from each gas’ individual contribution.
Key Terms
mole fraction: number of moles of one particular gas divided by the total moles of gas in the mixture
Dalton’s Law of Partial Pressures: the total pressure exerted by the mixture of non-reactive gases is equal to the sum of the partial pressures of each individual gas; also known as Dalton’s Law of Partial Pressures