A mixture was prepared in a 500 mL reaction vessel from 304 mL of O2 (measured at 14.0 C and 680 torr) and 559 mL of H2 (measured at 41.7 C and 1370 torr). The mixture was ignited and the H2 and O2 reacted to form water. What was the final pressure inside the reaction vessel after the reaction was over if the temperature was held at 115 C?