Chemistry Final Review

Front

What is the formula of calcium phosphate?

Back

Ca₃(PO₄)₂

Front

How many neutrons does the isotope of lithium have?

Back

5

Front

What does a negative ΔH indicate about a reaction?

Back

A reaction is exothermic and heat energy is released into the surroundings.

Front

What happens in an endothermic reaction?

Back

The system is gaining energy.

Front

What is the term for the substances formed in a chemical reaction?

Back

Product

Front

What is the term for the substances that undergo a chemical change?

Back

Reactants

Front

What is the definition of an exothermic reaction?

Back

A reaction that releases heat energy to the surroundings.

Front

What is the definition of an endothermic reaction?

Back

A reaction that absorbs heat energy from the surroundings.

Front

What is the significance of the arrow in a chemical equation?

Back

It indicates the direction of the reaction, separating reactants from products.

Front

What is the role of a catalyst in a chemical reaction?

Back

A catalyst speeds up the reaction without being consumed.