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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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Question

A 0.5-m³ rigid vessel initially contains saturated liquid–saturated vapor mixture of water at 120°C. The water is now heated until it reaches the critical state(point). Solve, 1. Show the process on T-v diagram with respect to saturation lines. 2. Determine the mass of the liquid water at the initial state.

Expert Solution

Step 1

Given Data:

The volume of the rigid tank is V = 0.5 m³.
The initial temperature is T= $120 ° C .$

Part (1):

Refer to TABLE A-1 to determine the critical volume of water.

The process can be shown on the T-v diagram as,

Step 2

Part (2):

The mass of mixture can be determined as,

$\begin{array}{rcl} m & = & \frac{V}{v_{c r}} \\ = & \frac{0.5 m^{3}}{0.003106 m^{3} / kg} \\ = & 160.9 kg \end{array}$

Refer to Table A-4 to determine the property of the steam at a temperature $120 ° C .$

$v_{f} = 0.001060 m^{3} / kg . v_{g} = 0.89133 m^{3} / kg .$

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