Table of Contents
- 1 On which law of thermodynamics does a fridge work?
- 2 On what principle does refrigerator works?
- 3 What is refrigeration thermodynamics?
- 4 Is a refrigerator a cold reservoir?
- 5 Does refrigerator violate Second Law Thermodynamics?
- 6 How does convection work in a fridge?
- 7 What is second law of thermodynamics in physics?
On which law of thermodynamics does a fridge work?
According to the second law of thermodynamics: “It is impossible for a self-acting machine unless energy is provided by any external agency, to transfer heat from a body having lower temperature to another at a higher temperature”. This is the basic principle used for the working of a refrigerator.
On what principle does refrigerator works?
The basic principle is that whenever a liquid coolant is passed through things at a higher temperature, it absorbs the heat; gets evaporated and the cooling effect is produced. The Refrigerator works on the principle of evaporation.
How does the first law of thermodynamics relate to refrigerators?
This law has more to do with modern refrigerators because it defines that it is possible to raise the temperature of a system either by adding heat (thermal energy) or by doing work on it.
What is refrigeration thermodynamics?
Refrigeration systems operate on a series of consecutive thermodynamic processes that form a cycle that returns the working substance to the same state. A thermodynamic refrigeration cycle removes heat from a low-temperature object (refrigeration) and rejects it at a higher temperature.
Is a refrigerator a cold reservoir?
Refrigerators (and Heat Pumps) to a hot reservoir. Its net effect is thus to make the cold reservoir colder (refrigeration) by removing heat from inside it to the warmer warm reservoir (warming it still further, e.g. as a heat pump).
What is a refrigerator Class 11?
Complete answer: A refrigerator works on the principle of the second law of thermodynamics. This law is related to the extraction of heat from a body i.e. to lower the temperature of the body. Hence, a refrigerator is a device which works on the principle that evaporation of a liquid gives a cooling effect.
Does refrigerator violate Second Law Thermodynamics?
Refrigerators appear to violate the Second Law of Thermodynamics, but the key reason they do not is because of the work needed as input to the system. They are essentially heat pumps, but work to cool a region instead of heat it.
How does convection work in a fridge?
Refrigerators operate using convection by circulating the gas through the copper lines inside of the refrigerator or freezer compartment. The lines, and the gas contained within them, absorb the heat contained in the refrigerator and freezer compartments, and are circulated back outside of the unit.
Which cycle is used in refrigeration?
vapor-compression refrigeration
The vapor-compression refrigeration is the most widely used cycle for refrigerators, air- conditioners, and heat pumps.
What is second law of thermodynamics in physics?
The second law of thermodynamics states that heat transfer occurs spontaneously only from higher to lower temperature bodies.