contestada

a sample of H2 is collected over water such that the combined hydrogen water vapor sample is held at a pressure of one standard atmosphere. what is the partial pressure of the H2 if that of the water vapor is 2.5 kPa

Respuesta :

Answer : The partial pressure of [tex]H_2[/tex] is 98.825 kPa.

Solution : Given,

Total pressure of hydrogen water vapor = 1 atm = 101.325 kPa    (1 atm = 101.325 kPa)

Partial pressure of water vapor = 2.5 kPa

Dalton's law of partial pressure : It is defined as the total pressure exerted is equal to the sum of the partial pressure of individual gases.

Formula used :

[tex]P_{Total}=\sum_{i=1}^nP_i[/tex]

[tex]P_{Total}[/tex] = Total pressure

[tex]P_{i}[/tex] = Partial pressure of individual gases

[tex]P_{Total}=P_{H_2}+P_{\text{ Water vapor}}[/tex]

Now put all the given values in this expression, we get

[tex]101.325kPa=P_{H_2}+2.5kPa[/tex]

[tex]P_{H_2}=98.825kPa[/tex]

Therefore, the partial pressure of [tex]H_2[/tex] is 98.825 kPa.