Propane, C3H8 burns according to equation
C3H8 (g) + 5 O2 (g) ------ 3 CO2 (g) + 4 H20

8.2L of propane and 32.0 L of oxygen were placed in a 42.4 L cylinder a 1.00 atm and 25 degree C. The gaseous mixture was ignited with a spark producing the gas products at 600 degrees C. Calculate the final pressure of the product gas mixture in the cylinder at 600 degrees C. (Assume cylinder does not change volume).