Question
Which one of the following statements is correct for a superheated vapour?
Options :
Its pressure is less than the saturation pressure at a given temperature.
Its temperature is less than the saturation temperature at a given pressure.
Its volume is less than the volume of the saturated vapour at a given temperature.
Its enthalpy is less than the enthalpy of the saturated vapour at a given pressure
Answer :
Its pressure is less than the saturation pressure at a given temperature.
Solution :
If the temperature of the fluid is greater than its saturation temperature corresponding to its pressure, the fluid is called superheated vapour.
Other characteristics of the superheated vapour are:
Mistake Point: If the pressure of a liquid is greater than the saturation pressure corresponding to its temperature, the liquid is said to be compressed liquid.
If the temperature of a liquid is less than the saturation temperature corresponding to its pressure, the liquid is in a subcooled liquid state.
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