Thermodynamic Systems Answer Check.

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SUMMARY

The discussion centers on classifying a thermal flask as a thermodynamic system, specifically whether it is an isolated, closed, or open system. Participants agree that in the long term, a thermal flask functions as a closed system, as it eventually allows heat transfer, leading to a temperature change. In the short term, it is debated whether it can be considered an isolated system due to its temporary retention of heat and matter. The consensus suggests that while a thermal flask approximates an isolated system, it is not perfect, as real-world flasks are not ideal insulators.

PREREQUISITES
  • Understanding of thermodynamic system classifications: Isolated, Closed, Open
  • Basic principles of heat transfer and insulation
  • Familiarity with the concept of ideal vs. real systems in thermodynamics
  • Knowledge of time-dependent behavior in thermodynamic systems
NEXT STEPS
  • Research the characteristics of ideal thermodynamic systems
  • Study real-world applications of thermal insulation materials
  • Explore the laws of thermodynamics and their implications on system classifications
  • Learn about heat transfer mechanisms in closed and isolated systems
USEFUL FOR

Students of thermodynamics, educators teaching physics concepts, and professionals in engineering or environmental science looking to deepen their understanding of thermodynamic systems.

keith river
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Question : State which type of thermodynamic system (Isolated, Closed, Open) the following are... Include in your answer which type of system they are relative to short and long time periods.
A list then followed.

I'm unsure about only one.
A thermal flask.

I know in the long term a thermal flask is a closed system (EG, after about a day or so hot tea would be cold) but in the short term I'd say a thermal flask is an isolated system (the tea doesn't leave nor does the heat)

But I know the only real isolated system is the entire universe so I'm unsure if this is an acceptable answer or not. What do you all think?
 
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keith river said:
Question : State which type of thermodynamic system (Isolated, Closed, Open) the following are... Include in your answer which type of system they are relative to short and long time periods.
A list then followed.

I'm unsure about only one.
A thermal flask.

I know in the long term a thermal flask is a closed system (EG, after about a day or so hot tea would be cold) but in the short term I'd say a thermal flask is an isolated system (the tea doesn't leave nor does the heat)

But I know the only real isolated system is the entire universe so I'm unsure if this is an acceptable answer or not. What do you all think?
I'm not 100% sure, because of the very reasons you gave, but ... I'm inclined to think they mean an ideal, perfectly insulated flask.

After giving your answer on your homework paper, you could add a remark along the lines of "However, a REAL flask would be ______."
 

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