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# ch01 - mass/size of system(Mass[m Volume[V • Intensive...

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Introduction: Chapter 1 • Thermodynamics is the study of energy • It covers a wide range of applications – we choose the system of interest • The surroundings are external to our system of interest

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Closed System (Control Mass) • No mass can cross system boundary • Energy may cross system boundary • Volume is NOT fixed • The system is said “isolated” if there is no exchange between this system and its surroundings
Open System/Control Volume • Mass may cross system boundary (control surface) • Volume may/may not be fixed • Energy may cross system boundary Control Volumes may operate at steady state, or change with time (empty/fill)

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Properties • System characteristic; carries both a numerical value and set of units • 3 Types of thermodynamics properties: Extensive, Intensive, • Extensive: Depend on

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Unformatted text preview: mass/size of system (Mass [m], Volume [V]) • Intensive: Independent of system mass/size (Pressure [P], Temperature [T]) • Specific: Extensive/mass (Specific Volume [v]) Definitions • State: Condition of a system as defined by its properties • Process: Change a system undergoes from one equilibrium state to another • Cycle: Series of processes that return system to initial state • Phase: Quantity of matter that is all solid, liquid or vapor (gas) • Special Types of Processes: – Isothermal – Isobaric – Isometric – Isentropic – Adiabatic Pressure and Temperature • P = Force/Area • Types: – Absolute – Gage (Vacuum) – Atmospheric • Measure of thermal energy; relative to hotness and coldness • Must use absolute temperature scales ( o R, K) atm gage abs P P P + =...
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ch01 - mass/size of system(Mass[m Volume[V • Intensive...

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