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- Can someone help me with this, Which of the following is incorrect regarding the first law of thermodynamics?
Which of the following is incorrect regarding the first law of thermodynamics?
- Option 1)
It introduces the concept of the internal energy
- Option 2)
It introduces the concept of entropy
- Option 3)
It is not applicable to any cyclic process
- Option 4)
It is a restatement of the principle of conservation of energy
Answers (4)
As we learnt in
First law of Thermodynamics -
Heat imported to a body in is in general used to increase internal energy and work done against external pressure.
- wherein
and
Second Law of Thermodynamics -
Planck's Statement
- wherein
It is impossible to extract heat from single body and convert whole into work.
and
Entropy -
It is a measure of disorder of molecular motion of a system.
- wherein
Greater is disorder greater is entropy
The concept of entropy is introduced in second law of thermodynamics.
First law dealt with internal energy, work and heat energy.
It is a statement of first law of thermodynamics.
Correct option is 2.
Option 1)
It introduces the concept of the internal energy
This option is incorrect.
Option 2)
It introduces the concept of entropy
This option is correct.
Option 3)
It is not applicable to any cyclic process
This option is incorrect.
Option 4)
It is a restatement of the principle of conservation of energy
This option is incorrect.
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