This document discusses thermodynamics systems and types. It defines a system, surroundings, and boundary, noting that the boundary is imaginary with zero thickness. It describes closed and open systems. A closed system is also called a control mass, where mass cannot enter or leave but energy in the form of heat or work can cross the boundary. An isolated system is a closed system that also does not allow heat transfer. An open system, also called a control volume, allows both mass and energy to enter or leave. Examples of closed, isolated, and open systems are provided.

1. Prof. Anand Joshi
THERMODYNAMICS
Basic Concepts
Thermodynamics System & Types

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WHY?
Thermodynamics System & Types
TO
START
OF ANY
ANALYSIS
WE NEED
TO
IDENTIFY

7. Prof. Anand Joshi
Thermodynamics System & Types
QUANTITY OF MATTER OR A REGION IN
SPACE CHOSEN FOR STUDY
SURROUNDING
SYSTEM
BOUNDRY
FIXED MOVABLE

8. Prof. Anand Joshi
Thermodynamics System & Types
BOUNDRY !!
Boundary Is The Contact Surface Shared By
Both The System And The Surroundings.
Mathematically Speaking,
The Boundary Has
Zero Thickness,
And Thus It Can
Neither Contain Any Mass
Nor Occupy Any Volume In Space.
IT’S
IMAGINERY

9. Prof. Anand Joshi
Thermodynamics System & Types
CLOSED SYSTEM
ALSO KNOWN AS
CONTROL MASS
NO MASS Can Enter Or
Leave A Closed System
But
ENERGY,
In The Form Of Heat Or Work,
Can Cross The Boundary
The Volume Of A Closed System
Does Not Have To Be Fixed
TYPES:
CLOSED
SYSTEM
&
OPENED
SYSTEM

10. Prof. Anand Joshi
Thermodynamics System & Types
CLOSED
SYSTEM
EXAMPLE
TYPES:
CLOSED
SYSTEM
&
OPENED
SYSTEM

11. Prof. Anand Joshi
Thermodynamics System & Types
ISOLATED
SYSTEM
EXAMPLE

12. Prof. Anand Joshi
Thermodynamics System & Types
OPEN SYSTEM
ALSO KNOWN AS CONTROL VOLUME
MASS and ENERGY
Can Enter Or Leave A Open System
TYPES:
CLOSED
SYSTEM
&
OPENED
SYSTEM

13. Prof. Anand Joshi
Thermodynamics System & Types
OPEN SYSTEM
TYPES:
CLOSED
SYSTEM
&
OPENED
SYSTEM

14. Prof. Anand Joshi
Thermodynamics System & Types
THANK YOU