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A mixture of gas is comprised of 53.5% N2 (by mole) and the rest is H2. This mixture is initially at 425 K and 2.50

A mixture of gas is comprised of 53.5% N2 (by mole) and the rest is H2. This mixture is initially at 425 K and 2.50 atm. It is then expanded to 0.75 atm. If the change in entropy is -2.02 kJ/(kgK), then what is the final temperature? What must have occurred for there to be a reduction in entropy (explain with words and show an equation, but numbers are not needed).

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