SUMMER INSTITUTE – Module 4 – Energy – Phase Changes
______________________________________________________________________________________________________________________________________ Module 3 ➙ 5 Jump to: Activity 1, Activity 2, Activity 3, Activity 4, Activity 5, Activity 6, Activity 7, Module Test
Module 4 – Energy – Phase Changes –
5 hours – due July 24th!
* Connections – We have learned that phase changes (melting, freezing, boiling, condensation, sublimation, deposition) physical processes but energy changes are still associated with them. We should now know which energy changes are now endothermic as well exothermic.
Activity 1: SKILL : Observe a heating Curve and identify the phase changes, melting points, boiling points, potential energy, kinetic energy and all points on the graph.
3: Please view the Ice melting Animation:
Notice that the water molecules are initially in the solid phase, which is a 3 dimensional geometric pattern (crystal formation). They are initially vibrating in their fixed positions very slowly (low temperature) and as they absorb kinetic energy (heat) their vibration increases. The vibrations increase up until the molecules start pulling away from each other(melting). Why would the temperature stay constant at this point.
6: Please view the following demonstrations
Activity 2: Applying Heating and Cooling Curves to a Laboratory Assignment
1 : Heating and Cooling Curve of an Unknown Substance
Activity 3: Heat of Fusion and Heat of Vaporization Problems
A1 : Lecture 1.15B – Heat of Fusion and heat of Vaporization
View Download 2 : Lecture 1.15C – Advanced Heat of Fusion and heat of Vaporization
Activity 4: SKILL: Determine the Heat of Fusion of Water – Lab
Experimentally determine the Hf for water – Endothermic Calorimetry.
LAB 6 honors heat of fusion.pdf
Module Test 4 – available below