Only answer part b

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Q3 (a) 1.2 g of fuel is ignited immediately at the end of the compression stroke of an internal compression engine. Duration of combustion in the Wiebe function is considered to be 55, and the necessary dataset for the engine is given as in Table Q3 below. i. Determine the pressure to reach the combustion temperature 1200C. ii. At an angular distance, 0=395, calculate the mass fraction of fuel burned. iii. Calculate the mass of unburned fuel at this angular distance (0). iv. Calculate the burn parameter if the combustion process is controlled with an ignition parameter of 3, at this angular distance (O). (b) Carbon soot is produced during the combustion process. i. Write down a chemical reaction to fully oxidise il. ii. Write done the rate equation for carbon conversion and mention the reaction order. iii. Finally, show that the mole concentration of carbon in the rate equation can be expressed as an exponential function. Table Q3: IC engine's design, operating and combustion conditions At the end of compression stroke Pressure 15 bar Temperature 100C Volume 40 cm At the end of combustion Pressure 20 bar Volume 80 cm Polytropic index 1.15 Volume at the angular distance (@=3959) | 45 cm