6. A6-m³ tank contains helium at 400 K and is evacuated trom atmospheric pressure to a pressure of 740 mm Hg vacuum. Determine (a) mass of helium remaining in the tank, tb) mass of helium pumped out, (c) the temperature of the Femaining helium falls to 10°C. What is the pressure in kPa?

6. A6-m³ tank contains helium at 400 K and is evacuated trom atmospheric pressure to a pressure of 740 mm Hg vacuum. Determine (a) mass of helium remaining in the tank, tb) mass of helium pumped out, (c) the temperature of the Femaining helium falls to 10°C. What is the pressure in kPa?

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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Chemical and Phase Equilibrium

Phase diagrams or equilibrium phase diagrams are the graphical representations that show the phase transformations of the constituting elements with respect to the pressure, temperature, and compositions. The diagrams show the conditions that limit the different phases, namely solid, liquid, and gas. The diagram can also be utilized to verify the relations between the state variables. Most of the phase diagrams are temperature-pressure phase diagrams, with the variable parameter as the composition. Usually other variables such as solubility and pressure parameters are not indicated in the phase diagram. For a one-component system (unary phase diagram), the phase diagram is generally a function of temperature and pressure as the state variables, or temperature and volume. However, for a binary system (two-phase) having two components, the phase diagram is a function of temperature and composition as the state variables only. Coexisting of the different phases of the constituting elements is indicated in the phase diagram. A ternary phase diagram can be characterized by consisting of three phases in equilibrium.

Question

ans: 0.01925kg, 0.7123kg, 1.886kPa

Use gas laws

6. A 6-m3 tank contains helium at 400K and is evacuated
hom atmospheric pressure to a pressure of 740 mm Hg
vacuum. Determine (a) mass of helium remaining in the tank,
(b) mass of helium pumped out, (c) the temperature of the
remaining helium falls to 10°C. What is the pressure in kPa?

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