Which chemical is used for cooling in refrigerator?

When ammonia is evaporated its pressure is very low. Thus, ammonia is used for cooling in refrigeration.

How is the inside of a refrigerator kept cool?

The fridge cools by transfering heat from the inside to the outside ambient air using a refrigerant as “transport vehicle” for heat. This is why you can get a portable heater for the winter but not a portable air conditioning system in the summer.

What liquid is in refrigerator?

liquid Freon
The liquid Freon in the external coil passes through an expansion valve into a coil inside the insulated compartment of the refrigerator. Now, the liquid is at a low pressure (as a result of the expansion) and is lower in temperature (cooler) than the air inside the refrigerator.

What chemicals are used in refrigerators?

Certain appliances, such as refrigerators, air conditioners, and freezers, contain chemicals called fluorinated hydrocarbons. People often refer to these chemicals as Freon, which is a leading brand name. Freon is a dangerous substance.

How cooling is produced in refrigerator?

In general, refrigerators are cooled through the evaporation of a volatile liquid—that is, they use a liquid that evaporates very easily, and this evaporation creates the cooling effect. They then compress the gas into a liquid again, and the whole process starts over.

What is the liquid in a fridge?

The working substance in a modern refrigerators is called the coolant; the coolant changes from gas to liquid as it goes from higher to lower temperature.

What is the chemical formula of Freon?

CCl2F2
Dichlorodifluoromethane/Formula

Why condenser is used in refrigerator?

3 Condenser. The function of the condenser in a refrigeration system is to transfer heat from the refrigerant to another medium, such as air and/or water. By rejecting heat, the gaseous refrigerant condenses to liquid inside the condenser.

What is Freon group?

The freon group of refrigerants are halo-carbon refrigerants. In the actual refrigerator, vapors of Freon (CCl2F2) acts as a refrigerant. They are non-inflammable and moderately toxic.

What is the working substance in a refrigerator called?

The working substance in a modern refrigerators is called the coolant; the coolant changes from gas to liquid as it goes from higher to lower temperature.

How does a gas fridge cool the fridge?

Then, the liquefied gas is feed to the internals of the fridge, over a relief valve and relieved to low pressure again. The liquid evaporates and by such cools down significantly. Then this gas is fed to the internal radiator inside the fridge, called the evaporator. So it absorbs the heat inside, thus cooling.

What is the thermodynamics of a refrigerator?

As we shall see, refrigerators (and air conditioners) rely on the thermodynamic application known as the heat engine, as well as the molecular properties of the substance contained in the coils of the refrigerator. One of the most important practical applications of the principles of thermodynamics is the heat engine (Figure 1).

How does the coolant in a refrigerator cool down?

As the word says, it cools, but how will you ask. The coolant is a gas at atmospheric pressure. When compressed it heats up as all gases do. Then it is fed to a radiator outside the fridge, called the condenser where it cools and condenses, so turns to a liquid at the high pressure.