(1) 10 kg/h (20% salt) initial 500 kg salt solution (t = 0, 10% salt) control volume (2) 5 kg/h Figure 4.1-5. Control volume for flow in a stirred tank for Example 4.1-2.

Extracted text: (1) 10 kg/h (20% salt) initial 500 kg salt solution (t = 0, 10% salt) control volume (2) 5 kg/h Figure 4.1-5. Control volume for flow in a stirred tank for Example 4.1-2.


Extracted text: Initially, a tank holds 500 kg of salt solution containing 10% salt. At point (1) in the control volume in Fig. 4.1-5, a stream enters at a constant flow rate of 10 kg/h containing 20% salt. A stream leaves at point (2) at a constant rate of 5 kg/h. The tank is well stirred. Derive an equation relating the weight fraction wĄ of the salt in the tank at any time t in hours.