Liquid water at 15 ℃ is heated by mixing it with saturated steam
at the same pressure. Liquid water enters a chamber at a rate of
4.3 kg/s and saturated steam enters at a rate of 0.17 kg/s. The
mixture leaves the mixing chamber as a saturated liquid at 40℃. If
the surroundings are at 15℃, determine (a) the temperature of the
saturated steam entering the chamber, (b) the exergy destruction
during this mixing process, and (c) the second-law efficiency...