Two thermally insulated vessels are connected by a narrow tube fitted with a valve that is initially closed as shown in the figure below. One vessel of volume V1 = 15.1 L,contains oxygen at a temperature of T1 = 320 K and a pressure of P1 = 1.70 atm. The other vessel of volume V2 = 22.5 L contains oxygen at a temperature of T2 = 445 K and a pressure of P2 = 1.90 atm. When the valve is opened, the gases in the two vessels mix and the temperature and pressure become uniform throughout.
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Can someone pls explain to me how you would go about solving this question, I have looked through my physics textbook but finding it hard to know where to start with this question.