EXAMPLE 15-7 First-Law Analysis of Combustion in a Bomb The constant-volume tank shown in Fig. 15-24 contains 1 lbmol of methane (CH₂) gas and 3 Ibmol of O₂ at 77°F and 1 atm. The contents of the tank are ignited, and the methane gas burns completely. If the final temperature is 1800 R, determine (a) the final pressure in the tank and (b) the heat transfer during this process. ​