An ideal, monatomic gas is allowed to expand quasi-statically and adiabatically from an initial volume Vi = 4.1 liter and initial temperature Ti = 390 K to a final volume of Vf = 9.2 liter. If there are n= 0.8 mol of gas, find the final temperature Tf. What is the final pressure pf?What is the work done by the gas?What is the change in the internal energy of the gas?Now, suppose that the gas expands quasi-statically and isothermally. Using the same values for Vi, Vf, Ti, and n, calculate the final pressure. Calculate the heat added to the system in this isothermal expansion.