All High School Chemistry Resources
Example Questions
Example Question #1 : Phase Diagrams And Transitions
Distillation requires which of the following?
Neither vaporization nor condensation
Condensation only
Vaporization only
Either vaporization or condensation
Vaporization and condensation
Vaporization and condensation
Distillation is the process by which liquids are purified of impurities. Distillation first requires vaporization of liquids to become pure gases. The gases are then cooled and turned back into pure liquids via condensation into a separate container. A good distillation will remove all impurities from the liquid. This is why distilled water is used for chemical solutions; it does not contain ions or other impurities that could interfere with reaction.
Example Question #502 : High School Chemistry
Which of the following occurs during vaporization?
Atoms get closer together and form a more rigid shape
Atoms become spaced further away from each other
Atoms become highly organized in patterns
Atoms disappear and are destroyed
Atoms become spaced further away from each other
Vaporization refers to the phase change from liquid to gas, also known as evaporation. When becoming a gas, atoms spread out and expand to fill whatever container they are in. Conservation of mass hold that atoms are never created nor destroyed. Atoms becoming more organized and forming a more rigid shape describes a phase change toward becoming solid.