# The synthesis of the iron(II) sulfide

## Questions

What is the initial heating for?

It is used to start the reaction. They say it provides the activation energy (comparable to the energy which a child must provide to mount to a toboggan).

Then the reaction generates heat. How do you call such a reaction?

This is an exothermic reaction (the child slides on the toboggan!)

Two elementary substances combine to form a compound. What is the type of this reaction?

It's a synthesis reaction

Write the equation for the reaction!

$8Fe$ $+$ $S_8$ $\longrightarrow$ $8FeS$.