A gas is allowe to expandin a well insulated container againsta constant external pressure of2.5 atmfrom an initial volume of2.50 Lto a final volume of 4.50L. The change in internal energy DeltaU of thegas in Joules will be

A gas is allowe to expandin a well insulated container againsta consta

1.	A gas is allowe to expandin a well insulated container againsta constant external pressure of2.5 atmfrom an initial volume of2.50 Lto a final volume of 4.50L. The change in internal energy DeltaU of thegas in Joules will be
Answer» <P>1136.25J` `-500J` `-505J` `+505J` SOLUTION :`DeltaU =q+w` For well insulated CONTAINER, process is adiabatic , `q=0` `:. DeltaU =w= - P DeltaV` `= - 2.5 atm ( 4.5 - 2.5) L` `=- 5L atm` `= 5xx 101.3 J= - 506.5 J ` `= -505J`