How to determine whether a system is closed or not?

In summary, a closed system is one in which no matter can enter or leave, and its amount of matter remains constant. This can be determined by observing if there are any external influences affecting the system. Some examples of closed systems include a sealed jar, a thermos, or a planet within its own atmosphere. The concept of entropy, which measures the disorder or randomness within a system, remains constant in a closed system. A system cannot be both open and closed, as a closed system does not allow for matter and energy to enter or leave, but can still interact with its surroundings through forces such as gravity.
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influx
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I know the definition of an open/closed system but I am still confused:

1) Why isn't C a closed system?

2) I know that a simple system's state is defined by just 2 properties (when the system is in equilibrium) but how do we eliminate the wrong answers and determine the correct answer in this question?

3) The independent variable = the thing you change (as far as I know) but that doesn't lead me any closer to the correct answer..

Cheers
 
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  • #2
C isn't a closed system because exhaust gases are entering and leaving the car exhaust (piping).
 

FAQ: How to determine whether a system is closed or not?

What is a closed system?

A closed system is a system in which no matter can enter or leave. This means that the amount of matter within the system remains constant.

How do you determine if a system is closed?

A system is considered closed if there are no external influences affecting it. This can be determined by observing if there is any matter entering or leaving the system, or if there are any external forces acting on the system.

What are some examples of closed systems?

Some examples of closed systems include a sealed jar, a thermos, or a planet within its own atmosphere. In these systems, matter cannot enter or leave, and the system is isolated from external influences.

How does the concept of entropy relate to closed systems?

Entropy is a measure of disorder or randomness within a system. In a closed system, the amount of matter and energy remains constant, meaning that the entropy of the system also remains constant over time.

Can a system be both open and closed?

No, a system can only be classified as either open or closed. An open system allows for matter and energy to enter and leave, while a closed system does not. However, a closed system can still interact with its surroundings through forces such as gravity, but it is not influenced by any matter or energy from outside the system.

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