Refrigerants are classified according to their manner of absorption or extraction of heat from substances to be refrigerated. The classifications can be broken down into…
Refrigerants are used in the process of refrigeration. Refrigeration is a process whereby heat is removed from a substance or a space. A refrigerant is…
Refrigeration machines are rated in tons of refrigeration. This rating indicates the size and ability to produce cooling energy in a given period. One ton…
A substance changes state when the inherent amount of heat is varied. Ice is water in a solid state and steam is a vapor state…
The perspiration on your body evaporates and cools your body. Water kept in a porous container is cooled on a hot day. The water seeps…
The heat required to change the state of a substance without changing its temperature is called its latent heat, or hidden heat. Theoretically, any substance…
Every substance theoretically contains an amount of heat equal to the heat energy required to raise its temperature from absolute zero to its temperature at…
Every substance has a characteristic called specific heat. This is the measure of the temperature change in a substance when a given amount of heat…
The production of excess heat in a system will cause problems. Normally, matter expands when heated. This is the principle of thermal expansion. The linear…
The layer of air that surrounds the earth is several miles deep. The weight of the air above exerts pressure in all directions. This pressure…