14. Two vessels both containing nitrogen, are connected by a valve which is opened to allow the contents to mix and achieve an equilibrium temperature of 27°C. Before mixing the following information is known about the gases in the two vessels. Vessel A Vessel B p = 15 bar t = 50°C Contents = 0.5 kg mole Calculate the final equilibrium pressure and amount of heat transferred to the surroundings. If the vessel had been perfectly insulated, calculate the final temperature and pressure which would have been p= 6 bar t = 20°C Contents = 2.5 kg reached. Take y = 1.4. [Ans. 11.68 bar, - 226.2 kJ, 45.5°C, 12.4 bar)

14. Two vessels both containing nitrogen, are connected by a valve which is opened to allow the contents to mix and achieve an equilibrium temperature of 27°C. Before mixing the following information is known about the gases in the two vessels. Vessel A Vessel B p = 15 bar t = 50°C Contents = 0.5 kg mole Calculate the final equilibrium pressure and amount of heat transferred to the surroundings. If the vessel had been perfectly insulated, calculate the final temperature and pressure which would have been p= 6 bar t = 20°C Contents = 2.5 kg reached. Take y = 1.4. [Ans. 11.68 bar, - 226.2 kJ, 45.5°C, 12.4 bar)

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

14. Two vessels both containing nitrogen, are connected by a valve which is opened to allow the contents to
mix and achieve an equilibrium temperature of 27°C. Before mixing the following information is known
about the gases in the two vessels.
Vessel A
Vessel B
p = 15 bar
t = 50°C
Contents = 0.5 kg mole
Calculate the final equilibrium pressure and amount of heat transferred to the surroundings. If the
vessel had been perfectly insulated, calculate the final temperature and pressure which would have been
reached.
p = 6 bar
t = 20°C
Contents = 2.5 kg
Take y = 1.4.
[Ans. 11.68 bar, – 226.2 kJ, 45.5°C, 12.4 bar]

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