PS9 Chemistry Final Prep (Part 3)

Front

What happens during a chemical reaction in terms of energy?

Back

Energy is absorbed as bonds are broken, and energy is released as bonds are formed.

Front

What type of reaction is characterized by the release of energy?

Back

An exothermic reaction.

Front

What type of compounds are characterized by ionic bonds?

Back

Ionic compounds are formed from the transfer of electrons between atoms, typically between metals and nonmetals.

Front

How can a chemist determine if a compound is ionic based on conductivity?

Back

Only the liquid sample of an ionic compound is a good conductor of electricity.

Front

What occurs when two hydrogen atoms react to form a hydrogen molecule?

Back

Energy is released as a bond is formed.

Front

Define an exothermic reaction.

Back

A reaction that releases energy, usually in the form of heat.

Front

Define an endothermic reaction.

Back

A reaction that absorbs energy from its surroundings.

Front

What is the difference between ionic and covalent compounds?

Back

Ionic compounds are formed by the transfer of electrons, while covalent compounds are formed by the sharing of electrons.

Front

What is a characteristic property of ionic compounds in solid form?

Back

Ionic compounds are generally poor conductors of electricity in solid form.

Front

What is a characteristic property of ionic compounds in liquid form?

Back

Ionic compounds are good conductors of electricity when melted or dissolved in water.