Reaction Processes

 $Oxygen\ +\ Iron\ \longrightarrow\ Rust$  
The molecules to the left of the arrow (Oxygen and Iron) are known as the __________ of the above reaction.

• Reactants

• Products

 $Oxygen\ +\ Iron\ \longrightarrow\ Rust$  
The molecule to the right of the arrow (Rust) is known as the __________ of the above reaction.

• Reactant

• Product

In a chemical reaction, the total mass of the reactants is not always equal to the mass of the products.

• True

• False

The Law of Conservation of Mass states that matter ...

• ... cannot be created or destroyed

• ... can be created or destroyed

• ... cannot be destroyed

• ... cannot be created

Molecules are always moving, what must they do if you want them to react? (one word)

What do molecules have to have if you want them to react?

• Enough energy

• Correct orientation

• Correct colour

• Enough atoms

An exothermic reaction occurs when the reactants ...

• ... absorb energy from the enviroment

• ... release energy into the enviroment

• … release as much energy as they absorb

An endothermic reaction occurs when the reactants ...

• ... absorb energy from the enviroment

• ... release energy into the enviroment

• … release as much energy as they absorb