GATE Mechanical Engineering (ME) 2017 Shift 2 Solved Paper

The volume and temperature of air (assumed to be an ideal gas) in a closed vessel is 2.87m³ and 300 K, respectively. The gauge pressure indicated by a manometer fitted to the wall of the vessel is 0.5 bar. If the gas constant of air is R = 287 J/kg K and the atmospheric pressure is 1 bar, the mass of air (in kg) in the vessel is