Question

# If pressure is applied to the equilibrium of solid $$\rightleftharpoons$$ liquid. The melting point of the solid :

A
will not change
B
may increase or decrease depending upon the nature of solid
C
will always increase
D
will always decrease

Solution

## The correct option is B may increase or decrease depending upon the nature of solidIf pressure is applied to the equilibrium of solid $$\rightleftharpoons$$ liquid. The melting point of the solid may increase or decrease depending upon the nature of solid.As, $$V\left(s\right) > V\left(l\right)$$ for ice-water and $$V\left(s\right) <V\left(l\right)$$ for others.For most substances, increasing the pressure when a system is in equilibrium between liquid and solid phases will increase the phase transition temperature. Water is one of a few special substances for which the pressure lowers the temperature of transition. The basic reason is that water actually expands when it goes from the liquid to solid phase.Chemistry

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