Chemistry Final Exam Review

What is the difference between a chemical change and a physical change?

• chemical changes create new substances
• physical changes create new substances
• chemical changes break apart atoms
• physical changes break apart atoms

Mixtures are divided into two classes. What are they?

• compounds and substances
• heterogeneous and compounds
• homogeneous and heterogeneous
• homogenous and elements

A solution has two parts. What is the name of the medium that dissolves in a solution?

• solute
• substance
• particle
• solvent

What is a homogeneous mixture?

• substance with 2 or more different element chemically combined
• substance with one type of atom chemically combined
• mixture where components are not evenly distributed throughout
• mixture in which the components are evenly distributed throughout

What is a compound?

• mixture which is evenly distributed throughout
• substance with 2 or more different elements chemically combined
• substance with 2 or more elements physically combined
• substance containing only one type of element

Which of the following signs does NOT indicate that a chemical change has happened?

• phase change
• foaming/bubbling
• production of heat/light
• change in color

Which process requires the gaining (absorption) of energy?

• condensation
• freezing
• melting
• deposition

What exothermic phase is occurring at point B in the phase change diagram shown?

• condensation
• freezing
• melting
• deposition

What state exists at point C in the phase change diagram shown?

• solid
• gas
• plasma
• liquid

Anything that takes up space and has mass is….

• mixture
• matter
• energy
• compound