A 10 L adiabatic container contains 0.1 mol of air, at atemperature of 250 K. It is closed by a stopcock. Ambient air is at300 K at a pressure of 1 bar. The stopcock is opened for a momentand a certain amount of air penetrates into the container. Afterthermal equilibrium is reached inside the container, the gastemperature is measured to be 350 K. 1) Assuming that the airbehaves as an ideal gas, find the initial pressure in thecontainer, the number of moles of air that penetrated in thecontainer, the sum of the internal energy changes for the gasinside the container and the gas that entered it and the finalpressure inside. 2) Find the enthalpy and entropy changes of thegas that is inside the container at the end of the process. Use κ =Cp,mol/CV,mol = 7/5 and Cp,mol − CV,mol = R.
