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Q3. A gaseous fuel has a volumetric composition of 20% CH₄, 24% H₂, 12% CO, 3 % O₂  and 41% nitrogen.

It is completely burred in air with an air to fuel ratio of 6 to 1 by volume.

(a) Calculate the volumetric analysis of the combustion products. (7)

(b) Calculate EACH of the following the dry combustion products:

(i) the characteristic gas constant; (3)

(ii) the specific heat at constant pressure; (4)

(iii) the adiabatic index. (2)

Note: atomic mass relationships C = 12, O = 16, N = 14, H = 1

Air contains 21 % oxygen by volume

Universal gas constant R_o = 8.3145  kJ⁄(kg K)

For CO₂, C_p =  0.939  kJ⁄(kg K)

For N₂, C_p = 1.044  kJ⁄(kg K)

For O₂ C_p = 0.941  kJ⁄(kg K)  .