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**Here is the problem:**

Two containers, A and B are filled with argon. The containers are connected by a pipe of negligible volume, but initially a valve in this pipe is CLOSED. Here are the given information:

Temperature of A and B = 300.15 Kelvin

Volume(A) = 0.05 cubic meters

Volume(B) = 0.15 cubic meters

Pressure in A and B = 101326.5 Pascals

Here is a rough drawing of the picture

__________

___ l l

l l____l B l

l A ____ l

l___l l_________l

**Questions 1:**

With the valve still shut, A is now heated up to 400.15 Kelvin while the temperature of B maintains at 300.15 Kelvin. The volumes remains the same. Calculate the pressure in A at 400.15 Kelvin.

(For this question, I manage to find the pressure at 400.15 Kelvin which is 135085.1 Pascal by using the equation (PV)/T=(PV)/T. So we can skip this question.)

**Question 2:**

The valve in the connecting tube is now OPENED while A and B are each maintained at 400.15 Kelvin and 300.15 Kelvin, respectively. What will the final (equilibrium) pressure of the system?

(I'm having problems with this question, I'm not sure on how to set it up. I was thinking of finding the new pressure for container A and then the pressure for container B. Then just average them for the equilibrium.)

It seems like there's a lot of information here but really I just need help with how to begin solving question 2. Thanks!