At room temperature ammonia gas at 1 atm pressure and hydrogen chloride at p atmospheric pressure are allowed to diffuse through identical pin holes from opposite ends of a glass tube of 1 metre length and of uniform cross-section. Ammonium chloride is first formed at a distance of 60 cm from the end through which HCl gas is sent in. what is the value of p ?

At room temperature ammonia gas at 1 atm pressure and hydrogen chlorid

1.	At room temperature ammonia gas at 1 atm pressure and hydrogen chloride at p atmospheric pressure are allowed to diffuse through identical pin holes from opposite ends of a glass tube of 1 metre length and of uniform cross-section. Ammonium chloride is first formed at a distance of 60 cm from the end through which HCl gas is sent in. what is the value of p ?
Answer» <P> Solution :In this problem the pressure under which the two gases are DIFFUSING are different. `(r_(NH_(3)))/(r_(HCl)) = sqrt((M_(HCl))/(M_(NH_(3)))) xx (p_(NH_(3)))/(p_(HCl)) = (40)/(60)` or `sqrt((36.5)/(17)) xx (1)/(p_(HCl)) = (40)/(60)` `p_(HCl) = 2.198` atm.