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An insulated box is separated by insulation partition into two parts, which is occupied by Ar...

An insulated box is separated by insulation partition into two parts, which is occupied by Ar (ideal gas, 1 mol, 300 K, 100 kPa) and N2 (ideal gas, 2 mol, 400 K, 200 kPa) respectively.

a) Find the final temperature after the partition is removed.

b) Find the S of mixing after the partition is removed.

[Hint: The mixing process can be divided to two parts: constant-volume process and isothermal process.

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