Liquids and Vapours Flashcards
What is a saturated liquid?
liquid on the point of vaporisation
What is the heat required to change a liquid to a vapour?
latent heat of vaporisation
What is the saturation condition?
when a substance is on the point of a phase change
What is the heat required to change a solid to a liquid?
latent heat of fusion
What happens to the P-v-T graph if there is a decrease in pressure?
*higher mpt
*lower bpt
*increase in volume during vaporisation
What happens to the P-V-T graph is there is an increase in pressure?
*lower mpt
*higher bpt
*decrease in volume during vaporisation
What happens if the pressure continues to be increased?
volume rise will drop to zero
What state is present when the quality is zero?
saturated liquid
What state is present when the quality is 1?
dry vapour
What happens if pressure continues to be reduced?
mpt and bpt will coincide
What is a saturated vapour?
vapour on the point of condensing
What can be said about the states above the critical point?
there is no definite transition from liquid to vapour phase
What is a superheated vapour?
vapour not on the point of condensing and with a temperature greater than the saturated temperature
What is a compressed liquid?
liquid at the temperature below the saturation temperature
What is the quality?
the ratio of mass vapour in a wet mixture, to the total mass
