Question

How much heat is released when 2.00 kg of aluminum solidifies? How many kJ is this?

Answer 1

As latent heat of fusion is equal to latent heat of freezing as the melting point and the freezing point is same.

The energy released

`"latent heat of fusion"/x xx "amount"(x)`

Here x is used to represent unit of quantity. Like it can mole, g, kilograms and so on

latent heat of fusion of aluminium = `"398kj/kg"`

`"398kj"/cancel("kg") * 2cancel("kg") = "796kj"`