Physics

Problem

An electric heater rated

120\,\text{W}

is used to melt

180\,\text{g}

of ice at

0^\circ\text{C}

. The temperature of the mixture remains at

0^\circ\text{C}

for the first

3.0\,\text{min}

before any rise is observed. Calculate the specific latent heat of fusion of ice from these observations.