Question
State and write mathematical expression for Dalton’s law of partial pressure and explain it with suitable example.
✓
Answer
i. Statement: The total pressure of a mixture of two or more non-reactive gases is the sum of the partial pressures of the individual gases in the mixture.
ii. Explanation:
Dalton's law can be mathematically expressed as:
$P_{\text {Total }}=P_1+P_2+P_3 \ldots$ (at constant $T$ and $V$ )
where, $P _{\text {Total }}$ is the total pressure of the mixture and $P _1, P _2, P _3, \ldots$ are the partial pressures of individual gases $1,2,3, \ldots$ in the mixture.
For example, consider two non-reactive gases A and B . On mixing the two gases, pressure exerted by individual gas $A$ in the mixture of both the gases is called partial pressure of gas $A$ (say $P_1$ ). Likewise, partial pressure of gas $B$ is $P_2$. According to Dalton's law, total pressure of the mixture of gas $A$ and $B$ at constant $T$ and $V$ will be given as:
$P_{\text {Total }}=P_1+P_2$.Schematic illustration of Dalton’s law of partial pressures:
ii. Explanation:
Dalton's law can be mathematically expressed as:
$P_{\text {Total }}=P_1+P_2+P_3 \ldots$ (at constant $T$ and $V$ )
where, $P _{\text {Total }}$ is the total pressure of the mixture and $P _1, P _2, P _3, \ldots$ are the partial pressures of individual gases $1,2,3, \ldots$ in the mixture.
For example, consider two non-reactive gases A and B . On mixing the two gases, pressure exerted by individual gas $A$ in the mixture of both the gases is called partial pressure of gas $A$ (say $P_1$ ). Likewise, partial pressure of gas $B$ is $P_2$. According to Dalton's law, total pressure of the mixture of gas $A$ and $B$ at constant $T$ and $V$ will be given as:
$P_{\text {Total }}=P_1+P_2$.Schematic illustration of Dalton’s law of partial pressures:
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