Question:
Why does the boundary between the liquid phase and gaseous phase disappear on heating a liquid to critical temperature in a closed vessel? In this situation what will be the state of the substance?
Solution:
The boundary between the liquid phase and gaseous phase disappear on heating a liquid up to critical temperature in a closed vessel because at the critical point the
densities of liquid and the vapour become equal. The fluid at this stage is called ‘supercritical fluid’
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