" Why does the temperature of a substance remain constant during its m.pt.or boiling point? "

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

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

A process in which the temperature of working substance reamains constant during its expansion or compression

Why the temperature of all bodies remains constant at room temperature?

Mention the reactions occuring at (i) anode (ii) cathode , during working of a mercury cell. Why does the voltage of a mercury cell remain constant during its operation?

Mention the reactions occuring at (i) anode (ii) cathode, during working of a mercury cell. Why does the voltage of a mercury cell remain constant during its operation?

Mention the reactions occurring at (i) anode, (ii) cathode, during working of a mercury cell. Why does the voltage of a mercury cell remain constant during its operation?

Why does the boiling temperature of liquid becomes constant once it starts boiling?

Why does the temperature of a liquid become constant at its boiling point all thorough it is still being heated ?