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Define thermodynamics.
The branch of science which deals with the study of different forms of energy and the quantitative relationships between them is known as thermodynamics.
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What do you understand by the terms: the system and surroundings?
A system in thermodynamics refers to that part of the universe in which observations are made and remaining universe constitutes the surrounding. The surroundings include everything other than the system. System and the surroundings together constitute the universe.
Classify the following into different types of systems:
(i) Tea placed in a cup
(ii) Tea placed in a tea-pot
(iii) Tea placed in a thermosflask.
(i) Open system.
(ii) Closed system.
(iii) Isolated system.
Define a closed system.
A system which can exchange energy but not matter with its surroundings is called a closed system.
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