Question

at ____ point the substance occurs into both solid and liquid state.​

Answer 1

Answer:

If the normal melting point of a substance is below room temperature, the substance is a liquid at room temperature. ... If both the normal melting point and the normal boiling point are above room temperature, the substance is a solid. Sodium chloride melts at 801°C and boils at 1413°C.

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Answer 2

Answer:

The point at which the lines intersect represents the triple point. At the pressure and temperature of the triple point, all three phases (solid, liquid and gas) exist in equilibrium. The triple point for water occurs at a pressure of 4.6 torr and 0.01oC.