Question

The total pressure of mixture of $8g$ of oxygen and $14g$ of nitrogen contained in a $11.2L$ vessel at $0^{o}C$ is:

• A. 0.5 atm
• B. 1 atm
• C. 1.5 atm
• D. 2 atm

Answer 1

The correct option is C 1.5 atm

Moles of oxygen $=\frac{8}{16\times 2}=\frac{0.5}{2}$

Moles of nitrogen $=\frac{14}{14\times 2}=\frac{1}{2}$

partial pressure of $O_2=\frac{{\cap }_{O2}RT}{v}$

partial pressure of $N_2=\frac{{\cap }_{N2}RT}{v}$

Total pressure $=P_{o_2}+P_{N_2}$

$=\frac{RT}{v}\frac{(1+0.5)}{2}=\frac{2.94}{2}Atm$

$\cong 1.5atm$