Question

Question No. /
Liquid nitrogen kept in a Dewar flask
depicts
system.
Answer
A. Qopen
B. O closed
c. O isolated
D. O isolated or closed.
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Answer 1

Answer:

Explanation:

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Answer 2

Liquid nitrogen kept in a Dewar flask  is an c. isolated system.

Explanation:

• Open system, closed system and isolated system are the three types of thermodynamic systems.
• In isolated sytem, there is no exchange of matter and energy to or from the surrounding environments.
• In closed system, there is no exchange of matter to or from the surroundings. But there will be exchange of energy to or from the surroundings.
• A type of vaccum flask that is used in laboratories to hold liquefied gases like liquid nitrogen, helium is called as a Dewar flask.
• Dewar flask holds te liquefied gases for a long period.
• Dewar flask doesn't allow the exchange of matter and energy to or from the environment.