How much energy must be removed from a 500 g block of ice to cool it from 0∘c to -35 ∘c? the specific heat of ice is 2090 jkg⋅k?

The quantity of heat (i.e. energy) needed to change the temperature of a substance by a certain  is

where m is the mass of the block of ice, m=500 g=0.5 Kg,  is its specific heat, and . Using these data, we obtain

and this is the energy we must remove.