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Tea placed in thermos flask is an exampl...

Tea placed in thermos flask is an example of

A

Open system

B

Close system

C

Isolated system

D

It can't act as system

Text Solution

AI Generated Solution

The correct Answer is:
To determine the type of system that a thermos flask containing tea represents, we can analyze the definitions of the different types of thermodynamic systems: open, closed, and isolated systems. ### Step-by-Step Solution: 1. **Understanding Open System**: - An open system is one where both matter and energy can be exchanged with the surroundings. - Example: A pot of boiling water without a lid, where steam (matter) can escape and heat can be lost to the environment. **Hint**: Think about whether substances can enter or leave the system. 2. **Understanding Closed System**: - A closed system allows for the exchange of energy (heat) but not matter with the surroundings. - Example: A sealed container of gas where heat can be transferred but the gas cannot escape. **Hint**: Consider if heat can flow in or out while the matter remains contained. 3. **Understanding Isolated System**: - An isolated system does not exchange matter or energy with its surroundings. - Example: A perfectly insulated thermos that keeps its contents at a constant temperature without any heat loss. **Hint**: Reflect on whether the system can lose heat or gain heat from the environment. 4. **Analyzing the Thermos Flask**: - When tea is placed in a thermos flask, it is designed to minimize heat transfer to the environment. - After some time, the tea remains hot, indicating that there is no significant heat loss (energy exchange) and no matter is escaping (the tea remains inside). **Hint**: Observe the behavior of the tea over time to determine if it stays hot or cools down. 5. **Conclusion**: - Since the thermos flask does not allow for the exchange of either matter or energy, it is classified as an isolated system. - Therefore, the correct answer is that a thermos flask containing tea is an example of an **isolated system**. ### Final Answer: The tea placed in a thermos flask is an example of an **isolated system**.
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