Reconsider Prob. 15–31. Using appropriate software, study the effects of varying the percentages of CH₄, H₂, and N₂ making up the fuel and the product gas temperature in the range 5 to 85°C.

Data from Prob. 15-31.

A gaseous fuel with a volumetric analysis of 45 percent CH₄, 35 percent H₂, and 20 percent N₂ is burned to completion with 130 percent theoretical air. Determine (a) the air–fuel ratio and (b) the fraction of water vapor that would condense if the product gases were cooled to 25°C at 1 atm.