Heat and Temperature Key Notes!

Heat:Is a form of energy.
         Its Unit is Joules (J)


Temperature: Measurement of the hotness or coldness of that object.
                        Its Unit is Kelvin. 

Relationship between degrees Celsius and Kelvin.

     Formula:

Temperature in degrees Celsius = Temperature in Kelvin – 273.15               (Does Not need to be known off by heart!-In Log Tables) Thermometric Properties A Thermometric Property is any physical property that changes measurably with temperature. Note: You must use the term ‘measurably’. Examples of thermometric properties: ·         Length of a column of liquid, e.g. mercury and alcohol thermometers, ·         Electrical resistance (see chapter 23), ·         Colour (colour ‘strips’ are sometimes used by nurses and placed against a person’s forehead), ·         Emf of a thermocouple (emf is a fancy word word for ‘voltage’), Formula:      Heat needed to change temperature/state                                                       Q = mcrq