Question

How do you find partial pressure from moles?

Answer 1

The partial pressure from moles can be calculated as:

1. The Hypothetical pressure of gas that is part of gaseous mixture occupy a certain volume at a certain temperature.
2. According to Dalton's law of partial pressure pressure exerted by the mixture of gases is equal to the pressure exerted by the each individual gas in a isolated container.
3. From the formula:

$$\begin{gathered} {\mathrm{X}}_{\mathrm{A}}={\mathrm{\eta }}_{\mathrm{A}}÷{\mathrm{\eta }}_{\mathrm{Total}} \\ ={\mathrm{P}}_{\mathrm{A}}÷{\mathrm{P}}_{\mathrm{Total}} \end{gathered}$$

where ${\mathrm{N}}_{\mathrm{A}}$ represent number of moles of gas $\mathrm{A}$ present in mixture.

${\mathrm{n}}_{\mathrm{Total}}$ represnt total number of moles present in mixture

${\mathrm{P}}_{\mathrm{Total}}$ represent total pressure of gas mixture

Therefore, a gas partial pressure can be determined from the given moles with the given formula:

${\mathrm{P}}_{\mathrm{A}}=\left({\mathrm{\eta }}_{\mathrm{A}}÷{\mathrm{N}}_{\mathrm{Total}}\right)\times {\mathrm{P}}_{\mathrm{Total}}$