Energy required to change the fluid phase from one form to another.

Temperature remains constantas SOLID turns to LIQUID. (qef=334 KJ/kg)

Temperature remains constantas LIQUID turns to GAS. (qfg=2257 KJ/kg)

Curve that shows the boundary between phases on a property diagram.

Contain 1 or more of the three halogens (Chloine, Fluorine, Bromine).

• Halocarbons

• Hydrocarbons

• Inorganic Compounds

• Azeotropic Mixtures

• Non-Azeotropic Mixtures

Consists of carbon and hydrogen (methane, ethane, propane).

• Halocarbons

• Hydrocarbons

• Inorganic Compounds

• Azeotropic Mixtures

• Non-Azeotropic Mixtures

Lacks carbon-hydrogen bonds (ammonia, water).

• Halocarbons

• Hydrocarbons

• Inorganic Compounds

• Azeotropic Mixtures

• Non-Azeotropic Mixtures

Consists of 2 substances having different properties but behaving as a single substance.

• Halocarbons

• Hydrocarbons

• Inorganic Compounds

• Azeotropic Mixtures

• Non-Azeotropic Mixtures

A fluid consisting of multiple components of different volatiles that, when used in ref cycles, change composition during evaporation or condensation.

• Halocarbons

• Hydrocarbons

• Inorganic Compounds

• Azeotropic Mixtures

• Non-Azeotropic Mixtures

A method of fitting the data points to represent the value of a function.