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Laws of Thermodynamics - Coggle Diagram
Laws of Thermodynamics
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Concepts
Heat Engines
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- The process in which mechanical work is obtained at the expense of internal energy is the basis of Heat Engines.
- It takes some heat from the body at high temperature, converts a part of it into mechanical work and delivers the rest to bodies at lower temperature.
- The substance inside the engine comes back to the original state.
- A process in which final state of the system is same as initial state, is called a cyclic process.
- Engine works in cyclic process.
Entropy
Adiabatic Process
In an adiabatic process, no heat is given or taken from the system.
- Entropy remains constant in such process.
- In a given equilibrium state, the system has a definite value of entropy.
dS = dQ/T
- If a small amount of heat dQ is given to a system at absolute temperature T, then change in entropy is dS.
- Entropy is related to disorder in a system.
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