Ethane (C2H6) is burned with excess air. The fuel and the air enter an adiabatic reactor at 25°C and 1 atm. You are to estimate the adiabatic flame temperature, Tad, for this system as a function of the percent excess air. Assume complete combustion. As a first approximation, you should do a calculation by hand using only the first term in the heat capacity equations to allow easy estimation of Tad. (a) Write your own MATLAB code that takes as input a user-supplied (prompt the user to input the value from the keyboard) percent excess air and computes the value of Tad for this problem. The coefficients for Cp and the heat of combustion should be hardcoded into the program (i.e., not input from the keyboard or read from a file). Use your code with only the first term for the Cp expression to make sure you get the same answer as you did by hand. Next put in the full polynomial for Cp and recalculate the value of Tad. Compare your answers using only the first term and using all terms and discuss the reason for the difference. (b) Modify your code so that it computes Tad over a range of values of the percent excess air (use a loop), asking the user to input the values of the percent excess air from the keyboard. Run your code for the following values: 25%, 50%, 100%, 200%, and print the values to the screen. Please turn in your hand calculations, a printout of the code, a printout of the output for part (a), and a printout of the results for part (b). PLEASE! Comment your code carefully, so that it is easy to read and follow (and hence easier to grade).

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Up to this point the heat Q in all problems and examples was either a given value or was obtained from the First Law relation However in various heat engines gas turbines and steam power plants the he... View the full answer