EGN_3358_Notes_Ch3_Properties of a pure substances-Part 2

EGN_3358_Notes_Ch3_Properties of a pure substances-Part 2 -...

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EGN-3358 – Thermo-Fluids-Heat Transfer EGN 3358 Thermo-Fluids-Heat Transfer Lecture 5: Properties of a Pure Substance “Chapter 3 - Part 2”
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EGN-3358 – Thermo-Fluids-Heat Transfer A fluid far enough from its saturation curve that it is not likely to condense into the liquid phase in any process is generally referred to as a gas . IF the temperature is high enough and the pressure is low enough, we consider it to be an ideal gas . Ideal Gas Equations of State 2
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EGN-3358 – Thermo-Fluids-Heat Transfer IF a fluid is a gas and T/T c > 2 or p/p c < 0.1 we consider it to be far enough from the saturation curve to behave as an ideal gas. Ideal Gas - Quantitative definition
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EGN-3358 – Thermo-Fluids-Heat Transfer constant = T pv The constant is called the “gas constant”, and is given the symbol “R”. Each different gas has a different value of R. for an Ideal Gas
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EGN-3358 – Thermo-Fluids-Heat Transfer Equal numbers of molecules behave similarly. Yield same value of gas constant, called universal gas constant, R u . Values in front of text: R u = 8.314 kJ/kgmol K, 1545 ft lbf/lbmol R, 1.986 Btu/lbmol R. Universal Gas Constant
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A mol is an Avagardo’s number of molecules, a mass equal to the molar mass of the gas in some mass unit, e.g. kg, lb, etc. Therefore:
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This note was uploaded on 11/25/2011 for the course EGN 3358 taught by Professor Sleiti during the Fall '07 term at University of Central Florida.

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EGN_3358_Notes_Ch3_Properties of a pure substances-Part 2 -...

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