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index(10) - Formulae Collection Revised 2/22/07 for Cengel...

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Unformatted text preview: Formulae Collection Revised 2/22/07 for Cengel Contents 1 Introduction 1 2 Units 1 3 Properties 1 4 Formulae for substances 2 4.1 Substances with saturated and superheated tables . . . . . . . . . . . . . . . . . . . . . . . . . 2 4.2 Ideal Gases . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 4.2.1 Ideal gases in A-17 through A-25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 4.2.2 Ideal gasses with constant specific heats . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 4.3 Solids and Liquids without saturated tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 5 Processes 5 5.1 Control Mass Processes (Closed Systems) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 5.2 Rate Equations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 5.3 Steady State Control Volume Processes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 6 Cycle Devices 8 1 Introduction These formulae are not guaranteed to be complete and/or correct, though we tried to make them so. The student has the final reponsibility for knowing all formulae covered in both class lectures and homework correctly. So, if you see an error, or miss a formulae that you think was covered, (if you are mistaken about that, it could get you in trouble!), let us know immediately. This document can not be taken to the exams. 2 Units Basic SI units are kilogram (kg), meter (m), and second (s). Many derived units exist. The book uses kPa, kJ, kW instead of the normal units Pa, J, W. Conversions may be needed (inside back-cover.) Definitions: 1 bar = 10 5 Pa. 1 atm = 101,325 Pa. 1 Absolute temperature (required in most formulae and some tables): add 273.15 to convert Centigrade into Kelvin, substract 273.15 to convert Kelvin into Centigrade. However, temperature differences are the same in Kelvin as in Centigrade; the two temperatures in the difference do not need to be converted. 3 Properties The intensive specific properties are lowercase, the corresponding extensive properties are uppercase: v = V m u = U m h = H m V = mv U = mu H = mh .......................................... Exams 3 and final only ......................................... s = S m S = ms ........................................ End exams 3 and final only ....................................... Definition of enthalpy: h u + pv .......................................... Exams 3 and final only ......................................... Definition of entropy: s integraldisplay ref parenleftbigg q T parenrightbigg rev ........................................ End exams 3 and final only ..........................................
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This note was uploaded on 07/09/2011 for the course EGN 5456 taught by Professor Dommelen during the Spring '09 term at FSU.

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index(10) - Formulae Collection Revised 2/22/07 for Cengel...

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