1. Phase Change Lab
Boiling Water Lab

2. Boiling Water Graph Liquid water was vaporizing into a gas
Boiling Point
***Flat spots on the graph
are:_________________
Liquid water was gaining energy
***Angles on the graph are
the:______________
Solid Water was melting
into a liquid

3. Graphing Phases & Phase Changes
Note: When the line is an angle, the substance is a “phase”
And when the line is flat, the substance is “changing phase”
Vapor
Vapor
Evaporation
/Boiling
Condensing
Liquid
Liquid
Melting
Freezing
Solid
Solid

4. Why does the graph change?
Q: What is the one big reason why the phases change?
A: Energy either increasing or decreasing!
Energy increasing
Energy decreasing

5. Graphing Phases & Phase Changes
Gas Phase
Liquid Phase
Solid Phase