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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 wa of the salt in the tank at any time t in hours.

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 wa of the salt in the tank at any time t in hours.

Introduction to Chemical Engineering Thermodynamics
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
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(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.
Transcribed Image 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.
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.
Transcribed Image 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.
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