contestada

Air is about 78.0% nitrogen molecules and 21.0% oxygen molecules. Several other gases make up the remaining 1% of air molecules.
Part A
What is the partial pressure of nitrogen in air at atmospheric pressure (1 atm)? Assume ideal behavior.
Express your answer to three significant figures and include the appropriate units.
Part B
This part will be visible after you complete previous part(s).
Part C
What is the partial pressure of oxygen in air at atmospheric pressure (1 atm)? Assume ideal behavior.
Express your answer to two decimal places and include the appropriate units.

Relax

Respuesta :

Answer:

For A: The partial pressure of nitrogen in air is 0.780 atm

For C: The partial pressure of oxygen in air is 0.210 atm

Explanation:

Raoult's law is the law that is used to calculate the partial pressure of the individual gases present in the mixture.

The equation for Raoult's law is given as:

[tex]p_A=\chi_A\times p_T[/tex]                  .....(1)

where,

[tex]p_A[/tex] = partial pressure of component A in the mixture

[tex]p_T[/tex] = total partial pressure of the mixture

[tex]\chi_A[/tex] = mole fraction of A

  • For A:

We are given:

% composition of nitrogen in air = 78.0 %

[tex]\chi_{N_2}=0.780\\\\p_T=1atm[/tex]

Putting values in equation 1, we get:

[tex]p_{N_2}=0.780\times 1atm\\\\p_{N_2}=0.780atm[/tex]

Hence, the partial pressure of nitrogen in air is 0.780 atm

  • For C:

We are given:

% composition of oxygen in air = 21.0 %

[tex]\chi_{O_2}=0.210\\\\p_T=1atm[/tex]

Putting values in equation 1, we get:

[tex]p_{O_2}=0.210\times 1atm\\\\p_{O_2}=0.210atm[/tex]

Hence, the partial pressure of oxygen in air is 0.210 atm