A separating and throttling calorimeter was used to determine the dryness fraction of steam flowing through a steam main at \(900 \mathrm{kPa}\). The pressure and temperature after throttling was \(105 \mathrm{kPa}\) and \(115^{\circ} \mathrm{C}\) respectively. The mass of steam condensed after throttling was \(1.8 \mathrm{~kg}\) and mass of water collected in the separating calorimeter was \(0.16 \mathrm{~kg}\). Determine the dryness fraction of steam flowing through the steam main. Take \(c_{p s}=2.09 \mathrm{~kJ} / \mathrm{kg}\).K.