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Unformatted text preview: pressure processes. 2, 3: San Francisco State University ENGR 303: Engineering Thermodynamics School of Engineering Prof. Ed Cheng, Spring 2011 HW 4 solutions 2 Dividing through by the mass m gives: out b in pw out w w q , , Where in pw w , is given as 50 kJ/kg and 1 2 , ln v v RT Pdv w out b (boundary work per unit mass for an isothermal process ideal gas; = 94.6 kJ/kg Therefore, q out = 44.6 kJ/kg 6. The correct answer is (b). 7. The correct answer is (d). The massflow rate must be equal at the inlet and outlet (for a single-stream device); however, the volume flow rate may differ if the density of the fluid differs. 4: v 2 / v 1 = V 2 / V 1 = 3 is given)...
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- Spring '09