Question

1 why does temperature remain constant during the melting of ice? a energy goes into breaking bonds rather than increasing temperature b temperature remains constant when heat is applied c all energy is used for increasing kinetic energy, not changing bonds d temperature fluctuates until all ice melts uniformly

Explanation:

When ice melts, the heat energy absorbed is used to break the intermolecular bonds (such as hydrogen bonds in water) in the solid - ice structure. Temperature is a measure of the average kinetic energy of the molecules. Since the energy is not used to increase the kinetic energy (which would raise the temperature) but rather to break the bonds (a phase - change process), the temperature remains constant during the melting of ice.

Option B is a circular statement as it just restates the phenomenon without giving a proper reason. Option C is incorrect because the energy is not used for increasing kinetic energy (as temperature is constant). Option D is wrong as temperature does not fluctuate during the melting of ice at a constant pressure.

Answer:

A. Energy goes into breaking bonds rather than increasing temperature