1 kg of water contained in a piston-cylinder assembly, initially at 160°C and 150 kPa,undergoes an isothermal compression process to saturated liquid. For the process, W = XXXXXXXXXXkJ.How do I show...

1 kg of water contained in a piston-cylinder assembly, initially at 160°C and 150 kPa,undergoes an isothermal compression process to saturated liquid. For the process, W = -471.5 kJ.How do I show that this process is internally reversibleI have already found the heat transfer to equal 471.5 kJ and the entropy to be 1.09kJ/K