Answer
Partial pressure of a gas in a mixture of gases is the pressure the gas would exert if it were the only component existing at the same volume and temperature.
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Dalton's law is a limiting law because it applies only under the conditions where the gases do not effect each other. This will be true only in the limit of zero pressure where the molecules of the gases are very distant from each other. Hence we can imply that Dalton's law applies only for a mixture of ideal gases.
Dalton's law is represented as the sum of the partial
pressures of the individual gases in the mixture.
Ptotal $=\mathrm{p}_{\mathrm{a}}+\mathrm{p}_{\mathrm{b}}+\mathrm{p}_{\mathrm{c}}$
Where $\mathrm{a}, \mathrm{b}$ and $\mathrm{c}$ represent the individual gases.
This expression emerges from the fact that in an ideal
gas the molecules are so distant from each other
that they do not interact with each other.
Work Step by Step
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