A throttling calorimeter is used to measure the dryness fraction of steam in the steam main where the steam is flowing at a pressure of 6 bar. The steam after passing through the calorimeter comes out at \(100 \mathrm{kPa}, 120^{\circ} \mathrm{C}\). Calculate the dryness fraction of steam. Specific heat of superheated steam is \(2.09 \mathrm{~kJ} / \mathrm{kg} . K\).