Chemical Reactions Review

Front

What is an endothermic reaction?

Back

An endothermic reaction absorbs heat from the surroundings, resulting in a decrease in temperature.

Front

What are reactants in a chemical reaction?

Back

Reactants are the substances that start a chemical reaction.

Front

What are products in a chemical reaction?

Back

Products are the substances that are created or made during a chemical reaction.

Front

How do you balance the chemical equation Al + S --> Al2S3?

Back

The balanced equation is 2 Al + 3 S --> 1 Al2S3.

Front

What does the arrow in a chemical reaction represent?

Back

The arrow represents 'YIELD', indicating the direction of the reaction from reactants to products.

Front

What is the difference between an exothermic and an endothermic reaction?

Back

An exothermic reaction releases heat, while an endothermic reaction absorbs heat.

Front

What is the law of conservation of mass in chemical reactions?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction; the total mass of reactants equals the total mass of products.

Front

What is a catalyst in a chemical reaction?

Back

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

Front

What is the role of energy in chemical reactions?

Back

Energy is required to break bonds in reactants and is released when new bonds form in products.

Front

What is a chemical equation?

Back

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