Chemical Reactions

Front

What is an exothermic reaction?

Back

A chemical reaction that releases energy in the form of light or heat.

Front

What are the products in a chemical reaction?

Back

The substances that are formed as a result of a chemical reaction, found on the right side of a chemical equation.

Front

What are reactants in a chemical reaction?

Back

The starting materials that undergo a chemical change, found on the left side of a chemical equation.

Front

If a reaction starts with 20g of reactants, what is the total mass of the products?

Back

The total mass of the products will also be 20g, according to the law of conservation of mass.

Front

How do you balance the chemical equation Fe + O2 -> Fe2O3?

Back

The correct balanced equation is 4Fe + 3O2 -> 2Fe2O3.

Front

What is the law of conservation of mass?

Back

In a chemical reaction, mass is neither created nor destroyed; the total mass of reactants equals the total mass of products.

Front

What is a chemical equation?

Back

A symbolic representation of a chemical reaction, showing the reactants and products along with their quantities.

Front

What is the difference between endothermic and exothermic reactions?

Back

Endothermic reactions absorb energy, while exothermic reactions release energy.

Front

What is a catalyst?

Back

A substance that increases the rate of a chemical reaction without being consumed in the process.

Front

What is a balanced chemical equation?

Back

An equation where the number of atoms for each element is the same on both sides of the equation.