PS1.B Flashcard

Front

What type of reaction occurs when hydrogen gas (H₂) and oxygen gas (O₂) react to form water (H₂O)?

Back

Synthesis reaction.

Front

Why is it important to balance chemical equations?

Back

To satisfy the law of conservation of mass.

Front

What happens to the chemical potential energy in an exothermic reaction?

Back

It decreases because energy is released as heat.

Front

What is the main evidence that a chemical reaction has occurred?

Back

The formation of new substances with different properties.

Front

What happens to the total energy in a chemical reaction?

Back

It remains constant due to the law of conservation of energy.

Front

Define a synthesis reaction.

Back

A reaction where two or more reactants combine to form a single product.

Front

What is the law of conservation of mass?

Back

Mass is neither created nor destroyed in a chemical reaction.

Front

What is an exothermic reaction?

Back

A reaction that releases energy in the form of heat.

Front

What is a chemical equation?

Back

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

Front

What is the difference between reactants and products?

Back

Reactants are substances that undergo a chemical change, while products are the substances formed as a result of the reaction.