Question

Thermodynamics

Answer 1

@agent0smith

Answer 2

I need V2. The system has boundary work.

Answer 3

I think I found a solution that might work.

Answer 4

I am going to use S2 - S1 = Q/T + sigma because I believe this system reversible + adeibatic = > isentropic.

Answer 5

I'd maybe remember some of this if i had more to go on, but as is I don't remember much unfortunately

Answer 6

I get that the mass of air is about 10kg, which seems high.

At 3 metres cubed, this is some big container. If it has been pumped with air and argon to a few bars, or atmospheres, then the question seems to be about heavy duty gas containers.
Since there’s not enough information to use the Van der Waals equation for a “real” gas maybe the thing can be solved by assuming an IDEAL gas, and with it, the IDEAL GAS EQUATION.

There seem to be several gases involved here. Air, being a mixture of 80% nitrogen and 20% oxygen are two of the ideal gases, with argon as the third.

The gases can be thought of as consisting of MOLECULES. In the cases of nitrogen, oxygen and argon, this amounts to assuming that each molecule is made up of TWO ATOMS, and atoms are what appear in the PERIODIC TABLE.

Gases can be thought of as COLLECTIONS of molecules, grouped into MOLES.
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Answer 7

Well I know how to solve this since you are saying each initial volume is 1.5m^3. Thanks.