Question

25 litre bottle of oxygen in a hospital. If the bottle is at 12 atmospheres, what volume of oxygen is available to the patient? If the oxygen is stored at 4 degrees C and used at 20 degrees, what difference does this make? (Assuming start volume and pressure are still 25 litres and 12 atmospheres).

Answer 1

I wonder what 12 atmospheres means? Is that absolute pressure,or guage pressure?

P1V1=P2V2
solve for V2.

FOr the second question..

P1V1/T1=P2V2/T2 temps in Kelvins. Solve for V2

Answer 2

Thanks. Also noted that V2 would only be 275 as once the pressure in the bottle reaches 1atm, the volume inside would be 25litres. So only 275litres are available.