Liquid water at 20°C is heated in a chamber by mixing it with saturated steam. Liquid water enters the chamber at the steam pressure at a rate of 4.6 kg/s and the saturated steam enters at a rate of 0.19 kg/s. The mixture leaves the mixing chamber as a liquid at 45°C. If the surroundings are at 20°C, determine
(a) The temperature of saturated steam entering the chamber,
(b) The exergy destruction during this mixing process, and
(c) The second-law efficiency of the mixing chamber.

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Water 20PC 4.6 kg/s Mixing chamber Mixture 45°C sat. vapor 0.19 kgis FIGURE P8-85