Steam at 250 psi and 700 F steadily enters a nozzle whose inlet area is 0.2 ft^2. The mass flow rate of steam through the nozzle is 10 lbm/s. Steam leaves the nozzle at 20 psi with a velocity of 900 ft/s. Heat loss from the nozzle per unit mass of steam are estimated to be 1.2 Btu/lbm. Determine the exit temperature of the steam.