Which of the following processes would you expect to involve an increase in entropy of the working fluid? You may select multiple answers.

$1)$ A liquid blend of water and ethanol $($the blend is the working fluid$)$ is separated into liquid ethanol and water via a membrane separation process.

$2)$ A heat flow into a piston filled with an ideal gas $($the working fluid$)$ causes the ideal gas to expand, driving the piston.

$3)$ A flow of steam $($the working fluid$)$ condensing in a heat exchanger to heat a room.

$4)$ A heat flow into water $($the working fluid$)$ causes the water to boil, driving a turbine.