Understanding Chemical Reactions Flashcard

Front

What is the main difference between physical and chemical changes?

Back

Chemical changes result in the formation of new substances.

Front

Which of the following is an indicator of a chemical change?

• Change in shape
• Change in temperature
• Change in state
• Change in size

Back

Change in temperature

Front

Activation energy

Back

The energy required to start a chemical reaction

Front

Which of the following describes an endothermic reaction?

Back

Absorbs heat from the surroundings

Front

What is a word equation in chemistry?

Back

An equation that uses words to describe a chemical reaction

Front

What is a skeleton equation?

Back

An equation that shows only the reactants and products

Front

What is a requirement for a balanced chemical equation?

Back

It must conserve mass and atoms.

Front

What symbol is used to indicate a gas in a balanced chemical equation?

Back

(g)

Front

What is the purpose of classifying chemical reactions?

Back

To predict the products of reactions

Front

What is a characteristic of a synthesis reaction?

Back

Two or more reactants combine to form a single product.