How Much Energy Does Ice Release When Cooled in a Freezer?

[roxxyroxx]

Homework Statement

A 3.0kg block of ice made in a fridge has an initial temp. of -5.0$$\circ$$C. It
is then moved to a much colder freezer. how much thermal energy is released by the ice as it cools to -40.0$$\circ$$C?

Homework Equations

E_H = mc$$\Delta$$T
for water, c = 4186 J/kg/$$\circ$$C

The Attempt at a Solution

E_H = mc$$\Delta$$T
E_H = (3.0kg)(4186 J/kg/$$\circ$$C)(-40.0$$\circ$$C - -5.0$$\circ$$C)
= -439530 J
but the answer should be 2.2 x 10^5 J
help?

 

[LowlyPion]

The specific heat of ice is different from that of water.