Solved: An ammonia solution at a high pressure is

Chapter 8, Problem 8.115

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An ammonia solution at a high pressure is flash-vaporized at a rate of 200 lbm/h. The solution contains 0.70 lbm NH3/lbm, and its enthalpy relative to H2O(l, 32F) and NH3(l, 40F) is 50 Btu/lbm. Liquid and gas streams emerge from the unit at 1 atm and 80F. Use Figure 8.5-2 to determine the mass flow rates and ammonia mass fractions of the vapor and the liquid product streams and the rate (Btu/h) at which heat must be transferred to the vaporizer. (See Example 8.5-4.)

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