Question

Three gases O₂, N₂ and Co₂ having masses 16g, 28g and 44g respectively are filled in a container of volume V. Evaluate total pressure if temperature of the gases is T. 

1. $\frac{3}{2}\frac{RT}{V}$
2. $\frac{RT}{V}$
3. $\frac{2}{5}\frac{RT}{V}$
4. $\frac{5}{2}\frac{RT}{V}$

Answer 1

The correct option is 4) $\frac{5}{2}\frac{RT}{V}$ 

$PV=(\frac{16}{32}+\frac{28}{28}+\frac{44}{44})RT$ 

$p=\frac{5}{2}\frac{RT}{V}$