A stream of gases at 7.5 bar, 750 ºC and 140 m/s enters the turbine of a jet engine. The stream comes out of the turbine at 2.0 bar, 550 ºC and 280 m/s. The enthalpies of the gas at entry asnd exit are 950 kJ/kg and 650 kJ/kg respectively. If the gas flow rate is 5 kg/s, what is the work output from the turbine?