Question

How much heat is released when 100 g of iron cools from 415°C to 100°C? (c = 0.44 J/g°C)

Answer 1

We will have the following:

We will determine the heat energy released as follows:

$\begin{gathered} Q=(100g)(0.44J/g°C)(100°C-415°C)\Rightarrow Q=-13860J \\ \\ \Rightarrow Q=-13.86kJ \end{gathered}$

So, the heat released was 13.86 kJ.