How much heat must be removed

Question

from 0.81 kg of water at 0 degrees Celsius to make ice cubes at 0 degrees Celsius.?

Answer 1

Look up in your physics book the latent heat of fusion of water l_f (in units of kJ/kg) and multiply it by the mass of the water in kg. The gives the required amount of heat in kJ that needs to be removed at a constant temperature of 0°C.

Q = ml_f