Question

A mixture of one mole each of H₂ , He and O₂ each are enclosed in a cylinder of volume V at temperature T. If the partial pressure of H₂ is 2 atm, the total pressure of the gases in the cylinder is : 

(1) 14 atm 

(2) 22 atm 

(3) 6 atm 

(4) 38 atm 

Answer 1

(3) 6 atm 

According to Dalton's law of partial pressure 

p_i = x_i × P_T 

_Pi = partial pressure of the i^th component 

x_i = mole fraction of the i^th component 

p_T = total pressure of mixture