GATE Mechanical Engineering (ME) 2017 Shift 1 Solved Paper

One kg of an ideal gas (gas constant, R = 400 J/kg.K : specific heat at constant volume, c_v = 1000 J/kg.k) at 1 bar, and 300 K is contained in a sealed rigid cylinder. During an adiabatic process, 100 kJ of work is done on the system by a stirrer. The increase in entropy of the system is ________J/K.