Water has a critical specific volume of $$0.003155$$ $${m^3}/kg.$$ A closed and rigid steel tank of volume $$0.025{m^3}$$ contains a mixture of water and steam at $$0.1MPa.$$ The mass of the mixture is $$10$$ $$kg.$$ The tank is now slowly heated. The liquid level inside the tank.

When wet steam flows through a throttle valve and remains wet at exit

Constant pressure lines in the super-heated region of the Mollier diagram will have

During the phase change of a pure substance: