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Physics, 30.03.2020 21:19 Renabelle5604

A single insulated duct flow experiment using air operating at steady-state is performed in a lab. One measurement location (State 1) provides a velocity of 75 m/s, temperature of 67oC, and pressure of 0.95 bar. Another measurement location (State 2) has a pressure of 0.8 bar, velocity of 310 m/s and temperature of 22oC. The scientist neglected to note the direction. a) What is the entropy change from State 2 to State 1? (in kJ/kg)? b) What is the direction of the flow? Prove and explain why.

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