Question

You have three containers each of which is connected to a fourth empty container. Three of the containers contain pure gases. In the first container oxygen is at 2 atm, nitrogen at 4 atm is in the second container, and argon at 1 atm is in the third. When you open the valve and mix the gases in the forth container, what is the pressure, PT, in the forth container

Answer 1

Answer: The total pressure is 7 atm

Explanation:

According to Dalton's law, the total pressure is the sum of individual pressures.

$p_{total}=p_A+p_B+p_C...$

Given : $p_{total}$ =total pressure of gases = ?

$p_{O_2}$ = partial pressure of oxygen = 2 atm

$p_{N_2}$ = partial pressure of nitrogen = 4 atm

$p_{Ar}$ = partial pressure of argon = 1 atm

putting in the values we get:

$p_{total}=2atm+4atm+1atm$  

$p_{total}=7atm$

Thus the total pressure is 7 atm