# Me 3322 Chapter 1

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ME 3322, Thermodynamics I

Chapter 1. Getting Started: Introductory Concepts and Definitions
Learning Outcome
► Demonstrate understanding of several fundamental concepts, including closed system, control volume, boundary and surroundings, property, state, process, the distinction between extensive and intensive properties, and equilibrium.
► Apply SI and English Engineering units, including units for specific volume, pressure, and temperature. ► Work with the Kelvin, Rankine, Celsius, and Fahrenheit temperature scales.
► Apply the problem-solving methodology used in this book.
Defining Systems
► System: whatever we want to study.
► Surroundings: everything external to the system.
► Boundary: distinguishes system from its surroundings.

Closed System
► A system that always contains the same matter.
► No transfer of mass across its boundary can occur.
► Isolated system: special type of closed system that does not interact in any way with its surroundings.
Control Volume
► A given region of space through which mass flows.
► Mass may cross the boundary of a control volume.
Macroscopic and Microscopic Views
► Systems can be described from the macroscopic and microscopic points of view.
► The microscopic approach aims to characterize by statistical means the average behavior of the particles making up a system and use this information to describe the overall behavior of the system. ► The macroscopic approach describes system behavior in terms of the gross effects of the particles making up the system – specifically, effects that can be measured by instruments such a pressure gages and thermometers.
► Engineering thermodynamics predominately uses the macroscopic approach.
1

ME 3322, Thermodynamics I
Property
► A macroscopic characteristic of a system to which a numerical value can be assigned at a given time without knowledge of...

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