Applied Engineering Thermodynamics Format: Two sides of A4 (max); i.e one piece of paper. Name and student number must be prominently placed at the top of the first page. Please use a cover sheet. Deadline: 26th April, 1000hrs. Late assignments will not be marked. The Assignment: Most car engines run on petrol, which can be treated as octane (C8H18). A top fuel dragster's fuel includes nitromethane (CH3NO2), which has complete combustion products of carbon dioxide, nitrogen and water. The fuels have calorific values of MJ/kg and 11.3 MJ/kg respectively. A common fuel in drag racing is a mixture of 10% octane and 90% nitromethane (molar fractions). (i) Write the combustion equation for the dragster fuel, including 20% excess air. (ii) If an engine running on octane produces 100 kW when running with 20% excess air, what power would it produce using the 10/90 fuel mix? Assume that the mechanical, volumetric and thermal efficiencies of the engine remain the same. Additional notes: (i) You don't have much room, so you will need to be concise and consider the level of detail in your calculations that you need to include. (ii) Remember to acknowledge your sources (including web sites), and to clearly state any assumptions that you make; you will lose marks otherwise. (iii) This is an individual assignment; use a little imagination – preferably your own – as I don't want to read 234 identically laid-out submissions. (iv) If you choose to hand-write your assignment, please make it legible: if I can't read it, I can't mark it. (v) Go back to the top of this page and read the Format paragraph again.