Name:
Per.
Phase Change Graphs with Energy and over Time
Phase Change Graph
Graph #2
Label the Phase Change Graph with the following words and show which direction the ‘heating’ arrows would go for
the terms.
• Vaporization
• Melting
• Liquid
• Condensation
• Freezing
• Thermal Energy
The Melting Point Temperature of Bromine is __-7.2_______.
The Boiling Point Temperature of Bromine is ____58.8______.
Graph #2 Questions
The second graph shows Bromine being heated and cooled (much like the Phase Change Gizmo).
What is the initial temperature? __ ~ 42_______ Initial State of Matter? liquid______________
What is the Final temperature? ____58.8__________ Final State of Matter? __liquid/gas combo____________
What is happening for the first half minute?
As thermal energy is removed the liquid’s temperature decreases
What is happening from 30 seconds until 1.5 minutes? As thermal energy is the liquid freezes solid
What is happening from 1.5 minutes to 2 minutes? As thermal energy is removed the solid’s temperature decreases
What is happening from 2 minutes to 2.5 minutes?
There is no thermal energy change so no temperature change.
What is happening from 2.5 minutes to nearly 3 minutes? As thermal energy is added the solid’s temperature increases
What is happening from 3min. to 3.5 min? As thermal energy is added the solid melts at it’s melting point.
What is happening from 3.5 minutes to 4 minutes? As thermal energy is added the liquid’s temperature increases
What is happening from 4 minutes to 5 minutes? As thermal energy is added the liquid begins to vaporize at it’s boiling
point.