lve is opened and the system comes to equilibrium.

A 0.5^3 rigid tank initially containing water with a quality of 95%, is connected to a piston/cylinder that has an initial volume of 0.1m^3 by a pipe with an initially closed valve. Both of these are maintained at 200C and the outside pressure is a contant 600 kPa. Calculate the chnage in entropy after the valve is opened and the system comes to equilibrium.