Fundamentals of Engineering
Thermodynamics Chapter 3 Terms
Phase - answer A *building block* of matter that is *homogeneous* throughout in both
*chemical composition* and *physical structure* Ex. Water
Homogeneity in Physical Structure - answer In physical structures, the matter is either
all solid, all liquid, or all gas
Homogeneity in Chemical Composition - answer The matter is the same in terms of
chemical form throughout
Pure Substance - answerA substance that is uniform and invariable in chemical
composition. *Can be made of multiple phases, but MUST have the same chemical
composition* (Air is the common exception) (Air is treated like a _____ ________
because it has a consistently equal gas distribution)
Simple Compressible System - answerA system of commonly encountered pure
substances. Values for any two *independent* intensive properties determine the values
for all other intensive properties. * Ex. Mixture of Liquid Water and Solid Water are both
made of H2O. Air is made of different elements but we treat it as a pure substance.
If they are different elements (Oxygen, Helium, Hydrogen), AS LONG AS THEY ARE
DISTRIBUTED EVENLY, THEY ARE A ________
Intensive State (of a Simple Compressible System) - answerDescribed by its intensive
properties, they are used to fix the state of the system (Ex. Temperature, Pressure,
Specific Volume, Density, Specific Internal Energy, Specific Enthalpy, Specific Entropy)
Phase Changes - answerSubstances change phases by adding or subtracting energy
Universal Gas Constant - answerthe combined proportionality constant in the ideal gas
law;0.08206 L atm/K mol
Mole - answerThe number of atoms in 12 grams of C-12 (6.022E23 atoms)
Pound Mole - answerThe number of atoms in 12 lb mass of C-12
Compressibility Factor - answerZ
Generalized Compressibility Factor - answerLimit definition for Z
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