steam enters a turbine with a velocity of 16m/s and enthalpy 2950kj/kg . the steam leaves turbine with a velocity 32m/s and specific enthalpy 2539kj/kg. the heat lost to the surroundings as the steam passes through the turbine Is 25kj/kg . the steam flow rate is 32400kg/hr. determine the work output from the turbine in kilowatt.?