Energy that causes molecules to be in motion and to raise the temperature of a substance.
The amount of heat requires to raise the temperature of 1lb of water 1°F
British Thermal Unit (BTU)
A term used to describe a substance when it contains all of another substance it can hold.
The gaseous state of a substance.
The amount of heat required to raise the temperature of 1il of substance 1°F
The capacity of doing work
Liquid formed when a capor condenses
The fluid in a refrigeration system that changes from a liquid to a vapor and back to a liquid at practical pressures.
Matter held together to extent that it is considered one body.
A gauge used to measure the pressure above and below the atmosphere's standard pressure. A Bourdon tube sensing device and can be found on all gage manifolds used for air conditioning and refrigeration service work.
The pressure that corresponds to the condensing temperature in a refrigeration system.
The temperature scale that places the boiling point of water at 212° and the freezing point at 32°
The condition that occurs when a substance change from one physical state to another such as ice to water and water to steam.
Change of State
The exact temperature at which moisture begins to form.
Heat that causes a change in temperature
The weight of the atmosphere's gases pressing down on the earth. Equal to 14.696psi at level and 70 °F
Heat energy absorbed or rejected when a substance is changing state and there is no change in temperature.
Lantent Heat (Hidden Heat)
A word used to describe the level of heat or molecular activity expressed in Fahrenheit, Rankine, Celsio Kelvin
The surrounding air temperature
The word used to describe the heat at lower levels of intensity
Heat that passes through air heating solid objects that in turn heat the surounding area
Quanity of heat 100,00 Btu
Heat transfer from one place to another using a fluid.
The condition that occurs when heat is absorbed by a liquid and it changes to a vapor
the amount of heat required to melt a ton (2,000lb) of ice at 32°F in 24 hours. 288,000 Btu/h or 200 Btu/min.