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2 TRG-TRC003-EN
notes
period one
Heat and Refrigeration
What is Heat?
Heat is a form of energy. Every object on earth contains heat energy in both
quantity and intensity.
Heat intensity is measured by its temperature, commonly in either degrees
Fahrenheit (°F) or degrees Celsius (°C). If all heat were removed from an
object, the temperature of the object would decrease to -459.6°F [-273.2°C].
This temperature is referred to as “absolute zero” and is the temperature at
which all molecular activity stops.
The quantity of heat contained in an object or substance is not the same as its
intensity of heat. For example, the hot sands of the desert contain a large
quantity of heat, but a single burning candle has a higher intensity of heat.
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