A boiler generates \(8.5 \mathrm{Kg}\) of steam per \(\mathrm{kg}\) of coal burned at a pressure of \(13.5 \mathrm{bar}\) from feed water having absolute temperature of \(350 \mathrm{~K}\). The boiler efficiency is \(70 \%\) and factor of evaporation 1.17. Taking specific heat of steam at constant pressure to be \(2.1 \mathrm{~kJ} / \mathrm{kg} . \mathrm{K}\), calculate

(a) Degree of super heat and temperature of steam generated,

(b) Calorific value of coal, and

(c) Equivalent evaporation