2. a) i. Name 2 products of complete combustion process. [2 marks] ii. Name 3 products of incomplete combustion process. [3 marks] b) An insulated tank that contains 1kg of C2H4 at 10C and 250kPa is connected to a 2 m3 uninsulated tank that contains C4H10 at 60C and 500kPa. The valve connecting the two tanks is opened, and the two gases form a homogeneous mixture at 25C. Assume T0=25C. By analyzing the adiabatic gas mixing process, calculate the: i. final pressure in the tank. [15 marks ] ii. heat transfer. [5 marks]