4-48 A 0.2-m3 rigid tank initially contains refrigerant-134aat 8°C. At in this state, 70 percent of the mass is in the vapor phase, and the rest the liquid phase. The tank is connected by a valve to a supply line where refrigerant at 1 MPa and 100°C flows steadily. Now the valve is opened slightly, and the refrigerant is allowed to enter the tank. When the pressure in the tank reaches 800 kPa, the entire refrigerant in the tank exists in the vapor phase only. At this point the valve is closed. Determine (a) the final temperature in the tank, (b) the mass of refrigerant that has entered the tank, and (c) the heat transfer between the system and the surroundings.

4-48 A 0.2-m3 rigid tank initially contains refrigerant-134aat 8°C. At in this state, 70 percent of the mass is in the vapor phase, and the rest the liquid phase. The tank is connected by a valve to a supply line where refrigerant at 1 MPa and 100°C flows steadily. Now the valve is opened slightly, and the refrigerant is allowed to enter the tank. When the pressure in the tank reaches 800 kPa, the entire refrigerant in the tank exists in the vapor phase only. At this point the valve is closed. Determine (a) the final temperature in the tank, (b) the mass of refrigerant that has entered the tank, and (c) the heat transfer between the system and the surroundings.

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

Properties of Pure Substances

A substance with fixed chemical composition throughout is called a pure substance like water, air, and nitrogen. A pure substance does not have to be a single element or compound. A mixture of two or more phases of a pure substance is also a pure substance as long as the chemical composition is the same for all phases. These substances mainly have a constant/ uniform composition. The substances also have fixed boiling and melting points. A pure substance takes part in a chemical reaction to form predictable products.

Question

4-48
A 0.2-m3 rigid tank initially contains refrigerant-134aat 8°C. At
this state, 70 percent of the mass is in the vapor phase, and the rest is in
the liquid phase. The tank is connected by a valve to a supply line where
refrigerant at 1 MPa and 100°C flows steadily. Now the valve is opened
slightly, and the refrigerant is allowed to enter the tank. When the
pressure in the tank reaches 800 kPa, the entire refrigerant in the tank
exists in the vapor phase only. At this point the valve is closed.
Determine (a) the final temperature in the tank, (b) the mass of refrigerant
that has entered the tank, and (c) the heat transfer between the system and
the surroundings.

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