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 THE RELATIONSHIP BETWEEN TEMPERATURE, HEAT AND ENERGY

 

DEFINITIONS
temperature - a qualitative measure of the amount of heat energy;
                     - it is a measure of the intensity or degree of heat energy.

heat - a quantitative measure of the amount of heat energy;
                     - it is a measure of the quantity or amount of heat energy.
 
 

MEASURES OF HEAT (HEAT ENERGY)
calorie (cal) - amount of heat (heat energy) required to raised 1 g of water by 1 oC.

kilocalorie (kcal) - 1,000 calories 

British Thermal Unit (BTU) - amount of heat required to raise 1 lb. of water by 1 oF.

specific heat - amount of heat (# calories) needed to raise 1 g of a substance by 1 oC. (water = 1.0)

heat of fusion - amount of heat (# calories) needed to change 1 g of a substance from solid to
                         liquid at its melting/freezing point. (water = 80 cal/g)

heat of vaporization - amount of heat (# calories) needed to change 1 g of a substance from
                                   liquid to gas at its boiling/condensation point. (water = 540 cal/g) 
 
 

WAYS TO TRANSFER HEAT (HEAT ENERGY)

There are 3 ways in which heat (heat energy) can be moved.

1) conduction- flow of heat energy through a medium from molecule to molecule.

2) convection - mass movement of heat energy.

3) radiation- flow of energy as electromagnetic waves, with no transferring medium; when 
                     radiation is absorbed it may be converted to heat energy.