Liquid ethanol C2H5OH at 298k, 1 atm enters a combustor operating at steady state and burns completely with air entering at 298k, 1 atm. The combustion product exit at 1120 k. The fuel mass flow rate is 0.01 kg/s. The heat transfer out of the combustor is 30 kW. Find:

1) the amount of excess air used.
2) mass flow rate of air.

Afour cylinder four-stroke in-line engine has a stroke of 160mm, connecting rod length of 150mm, a reciprocating mass of 3kg and its firing order is 1-3-4-2. the spacing between cylinders is 100mm. i. show that the engine is in balance with regard to the primary inertia forces and primary 3. a and secondary inertia couples. li determine the out of balance secondary inertia force ii. propose ways of balancing this out of balance force and discuss the challenges that will arise