It is often necessary to prepare a gas mixture with accurately known composition. such mixtures are used to calibrate gas analysis instruments. in the present case, a mixture of 80% ethylene (molar basis) (c2h4) and 20% carbon dioxide (co2) is prepared in the following manner. two un-insulated tanks, each of 4 liter volume, are connected together. one tank contains ethylene gas at 100 atm, 25 c. the other contains carbon dioxide at 25 c and pco2,1. the valve connecting the tanks is now opened and remains open for a long time until a homogeneous mixture at the desired proportions is obtained. the surroundings are at 25*c, 1 atm. answer the following questions assuming that the gas mixture obeys the ideal gas law. a. what is the initial co2 pressure, pco2,1? b. what is the final pressure of the gas mixture? c. what is the heat transfer for this process? d. what is the total entropy generation for this process?