Define the following terms with respect to steam:

1.B] Define the following terms with respect to steam:

  1. Saturation temperature
  2. Latent heat of vaporisation
  3. Quality of the steam
  4. Sensible heat
  5. Degree of superheat


1. Saturation temperature: The saturation temperature is the temperature for a corresponding saturation pressure at which a liquid boils into its vapor phase. The liquid can be said to be saturated with thermal energy. Any addition of thermal energy results in a phase transition.

2.Latent heat of vaporisation: Latent heat of vaporization is a physical property of a substance. It is defined as the heat required to change one mole of liquid at its boiling point under standard atmospheric pressure. It is expressed as kg/mol or kJ/kg.

3.Quality of the steam: Steam quality is the proportion of saturated steam (vapor) in a saturated condensate (liquid)/ steam (vapor) mixture. A steam quality of 0 indicates 100 % liquid, (condensate) while a steam quality of 100 indicates 100 % steam.

4.Sensible heat: Sensible Heat, it is the quantity of heat contained in 1 kg of water according to the selected temperature.

5.Degree of superheat: the degree of superheat can be defined as the amount by which the temperature of a superheat vapour/steam exceed the temperature of the saturated vapour/steam at the same pressure.

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