Semester Exam Review 2

Front

In an exothermic reaction, energy is _________.

Back

Released

Front

In a chemical equation, what do the coefficients indicate?

Back

The coefficients indicate the number of moles of each reactant used and the number of moles of each product made.

Front

What change occurs from E to C?

Back

Melting

Front

Which product is insoluble in the equation ZnCl2 + LiOH → Zn(OH)2 + LiCl?

Back

Zinc hydroxide

Front

Which of the following statements is NOT true of all different types of matter?

Back

The particles always move at the same speed.

Front

What is an exothermic reaction?

Back

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

Front

What is the difference between reactants and products in a chemical equation?

Back

Reactants are the starting substances, while products are the substances formed as a result of the reaction.

Front

Define sublimation.

Back

The process in which a solid changes directly into a gas without becoming a liquid.

Front

What is the phase change from liquid to solid called?

Back

Freezing.

Front

What is the significance of a balanced chemical equation?

Back

It shows that the number of atoms for each element is conserved during the reaction.