When a solid melts, why does the temperature remain constant and what happens to the arrangement of particles?

For any substance, why does the temperature remains constant during the change of state?

During boiling, the temperature remains constant. Why?

Explain the arrangement of particles in a solid.

In a solid hArr liquid equilibrium , temperature remains constant.

What happens to an enzyme at low temperature?

Why does the temperature of a substance remain constant during its melting point or boiling point ?

When a solid melts or a liquir boils, the temperature does not increase even when head is supplied .Where does not the energy go ?

Assertion When a charged particle moves perpendicular to a uniform magnetic field then its momentum remains constant. Reason Magnetic force acts perpendicular to the velocity of the particle.

Why does the temperature of a gas increase when it is suddenly compressed?

What is gout and why does it happen?