Heat transfer occurs from the steam to its surroundings at

Question

Steam enters a diffuser operating at steady state with a pressure of 14.7 lbf/in.² , a temperature of 300°F, and a velocity of 500 ft/s. Steam exits the diffuser as a saturated vapor with negligible kinetic energy. Heat transfer occurs from the steam to its surroundings at a rate of 19.59 Btu per lb of steam flowing. Neglecting potential energy effects, determine the exit pressure, in lbf/in.²