Chemical Reactions

Front

What is a chemical reaction?

Back

A chemical reaction is a process in which substances (reactants) undergo a transformation to form new substances (products).

Front

What does the Law of Conservation of Mass state?

Back

The Law of Conservation of Mass states that in a chemical reaction, the mass of the reactants is equal to the mass of the products.

Front

What is the balanced equation for the production of water from hydrogen and oxygen?

Back

2 H₂ + O₂ → 2 H₂O

Front

How do you balance a chemical equation?

Back

To balance a chemical equation, adjust the coefficients of the reactants and products so that the number of atoms of each element is the same on both sides.

Front

What is a reactant in a chemical reaction?

Back

A reactant is a substance that undergoes change during a chemical reaction.

Front

What is a product in a chemical reaction?

Back

A product is a substance that is formed as a result of a chemical reaction.

Front

What is the significance of coefficients in a chemical equation?

Back

Coefficients indicate the number of molecules or moles of each substance involved in the reaction.

Front

What is an example of a combustion reaction?

Back

An example of a combustion reaction is: CH₄ + 2 O₂ → CO₂ + 2 H₂O.

Front

What is the difference between an endothermic and exothermic reaction?

Back

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

Front

What is a balanced chemical equation?

Back

A balanced chemical equation has equal numbers of each type of atom on both sides of the equation.