HW#3 - Phase Diagrams

When particles collide with each other they...

• transfer kinetic energy
• stop completely still
• become smaller
• lose all their energy

An uncovered pot of soup is simmering on Mr. Wright's stove, and there are water droplets on the wall behind it. What sequence can you infer has occurred?

• vaporization, then condensation

• freezing, then thawing

• condensation, then vaporization

• Mr. Wright is a mess

The change from liquid to solid, or the reverse of melting, is called:

• freezing
• condensation
• boiling
• sublimation

What is vaporization?

• a liquid becoming a gas
• a gas becoming a liquid
• a liquid becoming a solid
• a gas becoming a solid

A shrinking puddle is an example of ___________, or vaporization that takes place only on the surface of a liquid.

• evaporation
• boiling
• freezing
• melting

Molecules have energy and _________ stop moving

• rarely
• always
• never
• sometimes

Matter changes state when...

• energy is added or removed
• energy is added
• energy is removed
• there is no energy

As molecules gain energy, they move _____ and spread apart, and vise versa.

• faster
• slower
• less
• inside

A measure of how hot or cold something is; specifically a measure of the average kinetic energy of the particles in an object.

• Thermometer
• Temperature
• Absolute Zero
• Specific Heat

Convert 273 K to ^oC

• 0^oC
• 100^oC
• -273^oC
• 50^oC