Which of the following is the statement of the first law of thermodynamics?
Correct answer: A. Difference between the heat given to the system and work done by the system appears as internal energy of the system
- A. Difference between the heat given to the system and work done by the system appears as internal energy of the system
- B. Difference between work done and the change in internal energy is equal to the heat absorbed by the system
- C. Some of the heat absorbed and the increase in internal energy is equal to the work done by the system
- D. Some of the heat absorbed and the work done by the system is equal to the decrease in the internal energy of the system
Explanation
The First Law of Thermodynamics states that the internal energy of the system is equal to sum of heat given to the system and work done by the system. This means that heat energy cannot be created or destroyed.
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About First Law of Thermodynamics
The first law relates heat supplied, work done and the change in internal energy through energy conservation. Problems use sign conventions and apply the law to isothermal, adiabatic, isobaric and isochoric processes. Internal energy is a state function, while heat and work depend on the path followed.
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