A hot-water stream at 80 °C enters a mixing chamber with a mass flow rate of 0.5 kg/s where is is mixed with a stream of cold water at 20 °C. If it is desired that the mixture leave the chamber at 42 °C, determine the mass flow rate of the cold water stream. Assume all the streams are at the same pressure of 250 kPa. T₁ = 80°C mt=0.5 kg/s T₂ = 20°C A. 0.840 kg/s B. 0.850 kg/s C. 0.865 kg/s D. 0.880 kg/s H₂O T₁ = 42ºC->> (P = 250 kPa)

A hot-water stream at 80 °C enters a mixing chamber with a mass flow rate of 0.5 kg/s where is is mixed with a stream of cold water at 20 °C. If it is desired that the mixture leave the chamber at 42 °C, determine the mass flow rate of the cold water stream. Assume all the streams are at the same pressure of 250 kPa. T₁ = 80°C mt=0.5 kg/s T₂ = 20°C A. 0.840 kg/s B. 0.850 kg/s C. 0.865 kg/s D. 0.880 kg/s H₂O T₁ = 42ºC->> (P = 250 kPa)

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Concept explainers

Chemical and Phase Equilibrium

Phase diagrams or equilibrium phase diagrams are the graphical representations that show the phase transformations of the constituting elements with respect to the pressure, temperature, and compositions. The diagrams show the conditions that limit the different phases, namely solid, liquid, and gas. The diagram can also be utilized to verify the relations between the state variables. Most of the phase diagrams are temperature-pressure phase diagrams, with the variable parameter as the composition. Usually other variables such as solubility and pressure parameters are not indicated in the phase diagram. For a one-component system (unary phase diagram), the phase diagram is generally a function of temperature and pressure as the state variables, or temperature and volume. However, for a binary system (two-phase) having two components, the phase diagram is a function of temperature and composition as the state variables only. Coexisting of the different phases of the constituting elements is indicated in the phase diagram. A ternary phase diagram can be characterized by consisting of three phases in equilibrium.

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Problem 7
A hot-water stream at 80 °C enters a mixing chamber with a mass flow rate of 0.5 kg/s where is
is mixed with a stream of cold water at 20 °C. If it is desired that the mixture leave the chamber
at 42 ˚C, determine the mass flow rate of the cold water stream. Assume all the streams are at
the same pressure of 250 kPa.
T₁ = 80°C
m = 0.5 kg/s
T₂ = 20°C
m₂
A. 0.840 kg/s
B. 0.850 kg/s
C. 0.865 kg/s
D. 0.880 kg/s
H₂O
(P = 250 kPa)
T₁ = 42°C →

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