In a fixed volume container of 0.1 m3, initially there is saturated water vapor at 130 oC. The vessel is connected to a pipe through which steam flows through a valve at 2 MPa pressure and 350 oC temperature. Then the valve opens and steam enters the container. Meanwhile, the temperature of the steam in the container remains constant at 130 oC due to the heat transfer to the environment. When it is observed that 3/4 of the water in the container covers the liquid phase by mass, the valve is closed. www ww www www w ww www w a) Calculate the final pressure in the container. b) calculate the mass of steam entering the container. c) Calculate the heat transfer to the environment.

In a fixed volume container of 0.1 m3, initially there is saturated water vapor at 130 oC. The vessel is connected to a pipe through which steam flows through a valve at 2 MPa pressure and 350 oC temperature. Then the valve opens and steam enters the container. Meanwhile, the temperature of the steam in the container remains constant at 130 oC due to the heat transfer to the environment. When it is observed that 3/4 of the water in the container covers the liquid phase by mass, the valve is closed. www ww www www w ww www w a) Calculate the final pressure in the container. b) calculate the mass of steam entering the container. c) Calculate the heat transfer to the environment.

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

In a fixed volume container of 0.1 m3, initially there is saturated water vapor at 130 oC. The vessel is
connected to a pipe through which steam flows through a valve at 2 MPa pressure and 350 oC
temperature. Then the valve opens and steam enters the container. Meanwhile, the temperature of
the steam in the container remains constant at 130 oC due to the heat transfer to the environment.
When it is observed that 3/4 of the water in the container covers the liquid phase by mass, the valve
is closed.
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a) Calculate the final pressure in the container.
b) calculate the mass of steam entering the container.
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c) Calculate the heat transfer to the environment.
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