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A 2-kg/s flow of steam at 1 MPa, 700°C should be brought to 500°C by spraying in liquid water at 1 MPa, 20°C in an steady flow. Find the rate of irreversibility, assuming that surroundings are at 20°C

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C.V. Mixing chamber, Steady flow. State 1 is superheated vapor in, state 2 is compressed liquid in, and state 3 is flow out. No work or heat transfer.

For state 2 interpolate between, saturated liquid 20°C and, compressed liquid 5 MPa, 20°C from  h2 = 84.9, s2 = 0.2964

  

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