Air at 600 kPa, 330 K enters a well-insulated, horizontal pipe having a diameter of 1.2 cm and exits at 120 kPa, 300 K. Applying the ideal gas model for air, determine at steady state (a) the inlet and exit velocities, each in m/s, (b) the mass flow rate, in kg/s, and (c) the rate of entropy production, in kW/K

a) 251.31 m/s and 55.29 m/s

b) The mass flow rate is 0.0396 kg/s

c) The rate of entropy production is 0.0144 kW/K

Explanation:

a) The steady state is:

mi = mo

The energy balance is:

Vi = 0.22 * 251.31 = 55.29 m/s

b) The mass flow rate is:

c) The entropy produced is equal to:

answer:

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explanation:

d. represents both (b) and (c).

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b and c are to complicated.

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explanation:

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