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In Figure Q1(b), a tank with size ? ?? .? ?? ? is filled with argon...

In Figure Q1(b), a tank with size ? ?? .? ?? ? is filled with argon at 18.5°C and 650 kPa. There is a leakage in the tank that caused the pressure to drop to 350 kPa. At this point, the temperature is decreased by 4°C. (i) Calculate the amount of argon leaked out from the tank. (ii) Can we assume the argon in this case as an ideal gas? Why? Also, how you relate the temperature decrease of this argon to the change of the internal energy from microscopic point of view?

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