Question

1. A rigid-sided flask contains an ideal gas at temperature 460^o C and pressure 4.32 atm. If the flask is now heated to 801 ^oC, find the new pressure inside the flask, in atm.

2. In a certain heat engine: a fuel-air mixture is injected into a cylinder of volume 6.06 cc at pressure 7.08 atm and temperature 383^o C. Now a piston comes down, compressing the gas to a volume 3.03 cc and pressure 64.2 atm. Find the Celsius temperature of the fuel-air mixture.

Answer 1

Initial Temperature = Tie 460°C = 733k. Initial Pressure=P = 4.32 atm & no. of moles of gas We can an ided Final Temperature= Tz = 801c=1074k. Final Pressure= P₂ - ? Since the container is sigid . Volume oh constant gas apply Pivi - Bola fox gas 4.32x733= P2 x 1074 = P2 = 4.32X 733 2.94 atm 1074 o Final Pressure = 2.94 atm 2) Puring the whole compression no. of moles constant of Nolong & Temperature changes Only Pressure, Initial Pressure = P = 7.08 atm Initia) Volume = Vi= 6.06cc. Initial Temperature TIF 383°C = 656k Final Pressure = P2 = 64.2 atm Finol. Volume=h2 = 3.03.cc... Finol Temp = TK = ? کده axe

P. VI = Pak Foo ideel I gas =) 7.08X6.06 656 64.2 x 3.03 Tz - T2 = 2974.24k = 2701. 24°C. oo Find Temperature=T=2701-24°C