Thermal Equilibrium


 
 
Concept Explanation
 

Thermal Equilibrium

Thermal Equilibrium:

When two bodies at different temperature are brought into contact with each other, heat flows from hotter body to colder body until they are both at same temperature, this is the state of Thermal Equilibrium.

 The amount of heat lost by the hotter body = the amount of heat gained by the colder body.

Day to day activities following Thermal Equilibrium:

  • When we place a hot water glass on the table in the room during the winter , it gets cool faster due the transfer of heat energy from hot water to the surrounding to maintain the equilibrium. After some time water reaches the  room temperature. At this point thermal equilibrium is maintained.
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    Sample Questions
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    Question : 1

    What is thermal equilibrium ?

    Right Option : C
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    Question : 2

    Which of the following are correct ?

    (a) The thermal equilibrium in the amount of heat lost by the hotter body to the amount of heat gained by the colder body.

    (b)  When a person comes out of bathing in hot water he feel relatively cold because the body had entered into equilibrium with the hot water is an example of thermal equilibrium .

    (c) When molten rock comes up from a volcano, it will give off heat to the atmosphere until the rock and the atmosphere are at the same temperature is an example of thermal equilibrium.

    Right Option : D
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    Question : 3

    When we place a hot water glass on the table in the room during the winter it gets cool faster due the transfer of _________________  from hot water to the surrounding to maintain the equilibrium. 

    Right Option : A
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