a constant pressure container (inside the piston-cylinder) with 250 kPa pressure at the beginning the mass of the saturated water vapor was 8 kg. Then the saturated steam in the cylinder compressed to...

a constant pressure container (inside the piston-cylinder) with 250 kPa pressure
at the beginning the mass of the saturated water vapor was 8 kg. Then the saturated steam in the cylinder compressed to 3/4 of its mass vy cooling.
1) what's the amount of heat transferred to the environment.