Heat contained in the Great Lakes

[princesspriya]

Homework Statement

the largest of the Great Lakes, Lake Superior contains 1.2*10^16kg of fresh water, which has a specific capacity of 4186J/kg*C and a latent heat of fusion of 3.33*10^5J/kg.
a.) If Lake Superior were still liquid at 0C, how much energy would need to be removed from the lake for it to become completely frozen?

Homework Equations

The Attempt at a Solution

Can someone just give me a hint or give me the equation to use because i have no clue what to do?

 

[alphysicist]

Hi princesspriya,

The latent heat of fusion shows that it would require 3.33*10^5 J of heat to melt one kg of ice that is at 0 degrees celsius, or you would need to remove that much heat to freeze one kg of water at that same temperature.

What equation does the latent heat appear in?