Continuous heating of an ice–water mixture at 0 °C does not raise its temperature…
PHYSICS · Single correct · CBSE · Physics · Thermal Properties of Matter · Thermal Properties of Matter
Problem
Continuous heating of an ice–water mixture at 0 °C does not raise its temperature until all the ice has melted. What is the correct reason for this behaviour?
(a) The supplied heat raises the temperature of the liquid water, but the simultaneous melting of ice cools it back to 0∘C, so the measured temperature stays constant.
(b) The supplied heat is used to overcome intermolecular forces (latent heat of fusion) during the phase change.
(c) The supplied heat increases the average kinetic energy of water molecules, yet the thermometer cannot register this change inside the mixture.
(d) Near the melting point, the ice–water mixture has an extremely large specific heat capacity, so any reasonable amount of heat causes negligible temperature rise.