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For an isolated system executing a process
1. no heat transfer takes place
2. no work is done
3. no mass crosses the boundary
4. no chemical reaction takes place within the system
Which of the above statement are correct?
  • a)
    1,2 and 3
  • b)
    1,3 and 4
  • c)
    2, 3 and 4
  • d)
    all of the above
Correct answer is option 'A'. Can you explain this answer?
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For an isolated system executing a process1. no heat transfer takes pl...
Isolated System and its characteristics

An isolated system is a thermodynamic system that does not exchange energy or matter with its surroundings. The system is completely self-contained, and there is no interaction with the environment. The system can be a physical or theoretical construct, and it is often used in thermodynamics to simplify the analysis of a process or system.

Characteristics of an isolated system:

- No heat transfer takes place: In an isolated system, there is no transfer of heat energy between the system and its surroundings. The system is thermally insulated, and the temperature of the system remains constant.
- No work is done: An isolated system does not perform any work on its surroundings, nor is any work done on the system by the surroundings.
- No mass crosses the boundary: In an isolated system, there is no transfer of matter across the system boundary. The total mass of the system remains constant.
- No chemical reaction takes place within the system: An isolated system does not undergo any chemical reactions within the system.

Correct statement for an isolated system

From the given options, the correct statement for an isolated system is:

a) 1, 2, and 3

Explanation:

- No heat transfer takes place: As an isolated system is thermally insulated, there is no transfer of heat between the system and its surroundings.
- No work is done: An isolated system does not perform any work on its surroundings or vice versa. Hence, no work is done.
- No mass crosses the boundary: In an isolated system, there is no transfer of matter across the system boundary. Hence, the total mass of the system remains constant.

Therefore, option 'a' is the correct statement for an isolated system.
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For an isolated system executing a process1. no heat transfer takes pl...
Isolated system is related to boundary phenomena but chemical reaction may take within system itself
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