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What is 1st law of thermodynamics?
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What is 1st law of thermodynamics?
1st Law of Thermodynamics
The First Law of Thermodynamics, also known as the Law of Energy Conservation, is a fundamental principle in physics and chemistry. It asserts that energy cannot be created or destroyed, only transformed from one form to another.
Key Concepts
Mathematical Representation
The First Law can be mathematically expressed as:
Applications
This law is crucial for analyzing energy systems in various scientific and engineering fields, making it a cornerstone of thermodynamics.
The First Law of Thermodynamics, also known as the Law of Energy Conservation, is a fundamental principle in physics and chemistry. It asserts that energy cannot be created or destroyed, only transformed from one form to another.
Key Concepts
- Energy Conservation: The total energy of an isolated system remains constant. When energy is added to a system, it can be transformed into work or heat.
- Internal Energy: The internal energy of a system is the total energy contained within it, arising from its molecules' kinetic and potential energies.
- Heat Transfer: Heat (Q) is energy transferred due to temperature differences. It can enter or leave a system, affecting its internal energy.
- Work Done: Work (W) is energy transferred when a force is applied over a distance. In thermodynamics, work done on or by a system also contributes to changes in internal energy.
Mathematical Representation
The First Law can be mathematically expressed as:
- ΔU = Q - W
- Where ΔU is the change in internal energy, Q is the heat added to the system, and W is the work done by the system.
Applications
- Heat Engines: The First Law is fundamental in understanding how heat engines convert thermal energy into mechanical work.
- Chemical Reactions: It helps in calculating the energy changes during chemical reactions.
- Refrigeration: The principles of energy conservation are applied in cooling and heating systems.
This law is crucial for analyzing energy systems in various scientific and engineering fields, making it a cornerstone of thermodynamics.
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What is 1st law of thermodynamics?
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What is 1st law of thermodynamics? for UPSC 2025 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about What is 1st law of thermodynamics? covers all topics & solutions for UPSC 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for What is 1st law of thermodynamics?.
What is 1st law of thermodynamics? for UPSC 2025 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about What is 1st law of thermodynamics? covers all topics & solutions for UPSC 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for What is 1st law of thermodynamics?.
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