hey babun u were right !!!!!!!!!!!!!!!!!!!!!!!!!!
i solved the prob using the clue u gave me
there i stil 5 lit left indside
and many people had trouble wid da question i posted
it is in its original form
but to be more presice the atmospheric pressure is 1 atm
and 1lit-atm=101.3J
dats wat it ment
anyway babun tanx!!!!!!!!!!