Measuring Temperature:

• The melting/freezing point of water at 1 atmosphere of pressure is 0 ^oC and 273 K.
   
• The boiling point of water at 1 atmosphere of pressure is 100 ^oC and 373 K.
   
• The interval between the melting/freexing point and the boiling point of water is divided into 100 intervals, each equal to 1 C^o and 1 Kelvin unit.
   
• The Kelvin scale extends downward from Celsius zero toward absolute zero - the lowest possible temperature. Therefore, the Kelvin scale has NO negative numbers.
   
• Kelvin temperatures are required when working "Gas Law" problems.
   
  • K = C^o + 273
     
  • C^o = K − 273