Question

The volume of a sample of hydrogen gas was decreased from 11.89 L to 5.18 L at constant temperature. If the final pressure exerted by the hydrogen gas sample was 8.46 atm, what pressure did the hydrogen gas exert before its volume was decreased?


______ atm

Answer 1

From 11.89 to 5.18 litres it is a decrease of 6.71 litres. The 5.18 liters of hydrogen gas has a pressure of 8.46 atm. 11.89/5.18=2.295 so 8.46x2,295=19.42 atm. This is assuming that the pressure of a gas is directly proportional to its volume.