A Gas in a Cylinder with a Piston That Slides

A gas in a cylinder with a piston that slides freely within is adiabatically expanded from 1.5 to 1.7 m³.If the pressure exerted by the walls on its container during the expansion was 2.0 atm,what heat must have been supplied to the gas in order to affect this expansion?

A) 0
B) +41 kJ
C) -41 kJ
D) +65 kJ
E) -65 kJ