Question

why does temperature remain constant during melting and boiling

Answer 1

Beacuse the temperature has low density

Answer 2

Hey friends here is your answer----------------------------^^^^^^^^^&*********



During melting, the heat being added to a substance goes into breaking apart the "molecules" or breaking down the crystal lattice, not into raising the temperature. During the phase change all the molecules continue to have the same kinetic energy, and therefore the temperature remains constant........During melting, the heat being added to a substance goes into breaking apart the "molecules" or breaking down the crystal lattice, not into raising the temperature. During the phase change all the molecules continue to have the same kinetic energy, and therefore the temperature remains constant.

The same thing happens at the boiling point. The energy goes into breaking the intermolecular bonds, but the average kinetic energy stays constant and so does the temperature until all of the bonds are broken and the substance is in the vapor state.
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