A piston-cylinder arrangement shown in the figure has a stop located $2 \mathrm{~m}$ above the base. The cylinder initially contains air at $140 \mathrm{kPa}$ and $350^{\circ} \mathrm{C}$ and the piston is resting in equilibrium at a position which is $1 \mathrm{~m}$ above the stops. The system is now cooled to the ambient temperature of $25^{\circ} \mathrm{C}$. Consider air to be an ideal gas with a value of gas constant $R=0.287 \mathrm{~kJ} /(\mathrm{kg} . \mathrm{K})$.
The absolute value of specific work done during the process is ___________ $\mathrm{kJ} / \mathrm{kg}$ (rounded off to $1$ decimal place)
