Agaseous fuel with a volumetric analysis of 60% ch4, 30% h2, and 10% n2 is burned completely with 130% theoretical air. determine the air-fuel ratio and the fraction of water vapor that would condense if the product gases were cooled to 20 °c at 1 atm.

10 kg of co2 is initially contained at 400 kpa and 300 k. the gas constant for carbon dioxide is 189 j/lkg k) and has a specific heat ratio, k, of 1.289. isentropic expansion then occurs until the pressure is 200 kpa. a) determine the initial volume of co2 in m. b) determine the final temperature in k. c) determine the work done by the system during the expansion kl.