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3 Steam at 7 bar and 280°C enters a pipeline and flows along it at constant pressure. If the steam rejects heat steadily to the surroundings, at what temperature will droplets of water begin to form in the vapour? Using the steady-flow energy equation, and neglecting changes in velocity of the steam, calculate the heat rejected per kilogram of ‘aveuTang We niGTTL GUETRY aHNW CHNMIpY OE LR, OI WK OXwUpyUK Ya MI” aL av va Ite internal emery is increased by 120K) as the ai is compressed to $0 bar, calculate the new volume ocupied by | ky ofthe fe — ALL, MAL Lp Oat wl vessel i is $0.04 m?, “Assuming that 0, i isa 8 perfect gas, calculate the mass of oxygen that can be stored in the vessel. The vessel is protected against excessive pressure by a fusible plug which will melt if the temperature rises too high. At what temperature must the plug melt to limit the pressure in the vessel to 240 bar? The molar mass of oxygen is 32 kg/kmol, (10.5 kg; 786°C)