(Solved): 25 m3/hr of air at 600 kPa, 330 K enters a well-insulated, horizontal pipe having a diameter of 1.2 ...

25 m³/hr of air at 600 kPa, 330 K enters a well-insulated, horizontal pipe having a diameter of 1.2 cm and exits at 120 kPa. Assume steady state and use the ideal gas model for the air. Also assume constant specific heat, c = 1.007 kJ/kg·K for air at 330K.

Determine the mass flow rate, in kg/s, and the exit velocity, in m/s.

$$25{\mathrm{m}}^3/\mathrm{hr}$$ of air at $$600\mathrm{kPa},330\mathrm{K}$$ enters a well-insulated, horizontal pipe having a diameter of $$1.2\mathrm{cm}$$ and exits at 120 $$\mathrm{kPa}$$. Assume steady state and use the ideal gas model for the air. Also assume constant specific heat, $$\mathrm{c}=1.007\mathrm{kJ}/\mathrm{kg}?\mathrm{K}$$ for air at $$330\mathrm{K}$$. Determine the mass flow rate, in $$\mathrm{kg}/\mathrm{s}$$, and the exit velocity, in $$\mathrm{m}/\mathrm{s}$$. Step 1 Determine the mass flow rate, in $$\mathrm{kg}/\mathrm{s}$$. $${\stackrel{?}{m}}_1=\mathrm{g}/\mathrm{s}$$ Step 2 Determine the exit velocity, in $$\mathrm{m}/\mathrm{s}$$. $$v_2=\mathrm{m}/\mathrm{s}$$