Determine dryness fraction of steam supplied to a separating and throttling calorimeter.

Water separated in separating calorimeter \(=\) \(0.45 \mathrm{~kg}\)

Steam discharged from throttling calorimeter \(=\) \(7 \mathrm{~kg}\)

Steam pressure in the main pipe \(=1.2 \mathrm{MPa}\)

Barometer reading \(=760 \mathrm{~mm}\) of \(\mathrm{Hg}\)

Manometer reading \(=180 \mathrm{~mm}\) of \(\mathrm{Hg}\)

Temperature of steam after throttling \(=140^{\circ} \mathrm{C}\); \(C_{p}=2.1 \mathrm{~kJ} / \mathrm{kgK}\)