Q2. Consider a piston-cylinder device that contains liquid water at 1 MPa and 150 °C. Theweights on top of the piston are removed one by one so that the pressure inside the cylinderdecreases gradually (Fig. 3–18). Draw a property diagram that shows all the water states includingphase change processes, which will go from compressed liquid to super-heated vapor whilekeeping the temperature constant in the system.P = 1 MPaT = 150°CHeat 01. Consider a piston-cylinder device containing liquid water at 20 °C and 1 atm pressure (state1, Fig. 3-5). Draw a property diagram that shows all the water states including phase changeprocesses, which will go from compressed liquid to super-heated vapor while keeping the pressureconstant in the system.State 1P= 1 atmT= 20°CHeatFIGURE 3-5At 1 atm and 20°C, water exists in theliquid phase[1]

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Q2. Consider a piston-cylinder device that contains liquid water at 1 MPa and 150 °C. The weights on top of the piston are removed one by one so that the pressure inside the cylinder decreases gradually (Fig. 3–18). Draw a property diagram that shows all the water states including phase change processes, which will go from compressed liquid to super-heated vapor while keeping the temperature constant in the system. P= 1 MPa T= 150°C Heat

Q2. Consider a piston-cylinder device that contains liquid water at 1 MPa and 150 °C. The weights on top of the piston are removed one by one so that the pressure inside the cylinder decreases gradually (Fig. 3–18). Draw a property diagram that shows all the water states including phase change processes, which will go from compressed liquid to super-heated vapor while keeping the temperature constant in the system. P= 1 MPa T= 150°C Heat

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

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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.

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Q2. Consider a piston-cylinder device that contains liquid water at 1 MPa and 150 °C. The
weights on top of the piston are removed one by one so that the pressure inside the cylinder
decreases gradually (Fig. 3–18). Draw a property diagram that shows all the water states including
phase change processes, which will go from compressed liquid to super-heated vapor while
keeping the temperature constant in the system.
P = 1 MPa
T = 150°C
Heat

01. Consider a piston-cylinder device containing liquid water at 20 °C and 1 atm pressure (state
1, Fig. 3-5). Draw a property diagram that shows all the water states including phase change
processes, which will go from compressed liquid to super-heated vapor while keeping the pressure
constant in the system.
State 1
P= 1 atm
T= 20°C
Heat
FIGURE 3-5
At 1 atm and 20°C, water exists in the
liquid phase
[1]

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