Question

7. A mixture of N, and Co, at one atm pressure
contains 56% by weight of N . Partial pressure of
N, in the mixture will be [NCERT Pg. 146]
(1) 0.56 atm
(2) 0.44 atm
(3) 0.67 atm
(4) 0.33 atm​

Answer 1

Given:

A mixture of $N_{2}$ and Co, at one atm pressure, contains 56% by weight of

To Find:

What is the partial pressure of N in the mixture?

Solution:

Here, as $N_2$ is of 56% of the mixture, therefore $CO_2$ will be 44% of the mixture.

Let us consider the mixture to be 100g

Therefore, moles of $N_2$ $=\frac{56}{28}=$ 2 moles

No. of moles of $CO_2$$=\frac{44}{44} =$  1 mole

Partial Pressure of gas= Mole fraction of the gas $\times$Total pressure

Here, the total pressure is 1atm

Therefore, the partial pressure of $N_2=\frac{2}{3} \times 1=0.667atm$