Writing Chemical Equations

Front

What is an endothermic reaction?

Back

An endothermic reaction is a chemical reaction that absorbs heat from its surroundings, resulting in a decrease in temperature.

Front

What are products in a chemical reaction?

Back

Products are the substances that are formed as a result of a chemical reaction.

Front

In the reaction of hydrogen gas and oxygen gas, what is produced?

Back

Water (H2O) is produced when hydrogen gas reacts with oxygen gas.

Front

What happens to temperature in an exothermic reaction?

Back

In an exothermic reaction, the temperature increases as heat is released into the surroundings.

Front

What is NOT an example of a chemical change?

Back

Change in size is NOT an example of a chemical change; it is a physical change.

Front

What is a reactant?

Back

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

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.

Front

What is a chemical equation?

Back

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

Front

What does a balanced chemical equation indicate?

Back

A balanced chemical equation indicates that the number of atoms for each element is the same on both sides of the equation.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change alters the form of a substance but not its chemical composition, while a chemical change results in the formation of new substances.