First Law
First law expresses conservation of:
Select the correct option:
Solution
Energy
The First Law of Thermodynamics is a statement of the Law of Conservation of Energy for thermodynamic systems.
- It states that the change in internal energy (ΞU) of a system is equal to the heat added (Q) to the system minus the work done (W) by the system: ΞU=QβW (Standard Physics convention)
- Internal energy is a state function, meaning it depends only on the initial and final states, not the path taken.
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More first law Practice Questions
In first law ΞU = Q - W, W is taken positive when?
In first law ΞU = Q - W, W is taken positive when?
Which of the following situations best illustrates Newtonβs First Law of Motion?
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A block of mass 2 kg is placed on a frictionless horizontal surface. If no external force acts on it...
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Which statement best expresses Newton's First Law?
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About This Question
- Subject
- physics
- Chapter
- thermodynamics
- Topic
- first law
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
Energy
The First Law of Thermodynamics is a statement of the Law of Conservation of Energy for thermodynamic systems.
- It states that the change in internal energy (ΞU) of a system is equal to the heat added (Q) to the system minus the work done (W) by the system: ΞU=QβW (Standard Physics convention)
- Internal energy is a state function, meaning it depends only on the initial and final states, not the path taken.
This easy difficulty physics question is from the chapter thermodynamics, covering the topic of first law. It appeared in the 2025 exam.
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