# LOL Energy Diagrams

Document Sample

```					Phase Diagrams/Cooling Curve                                            Name_______________________
NAHS Chemistry                                                          Per ____ Date __________________

1.     In your composition notebook, sketch the cooling curve for ethanol considering its melting point is
-94.6 0C and its boiling point is 56.5 oC.

a.     Draw particle diagrams at each of the 6 points (a-f) on the graph, identified above.

b. Identify the phases present at each of the 6 points on the graph by the particle diagrams.

c. Label which phase change (if any) is taking place at each segment of the graph on the graph (i.e. a-b, b-c).

d. Describe how the arrangement of the particles changes for each segment of the graph (i.e. a-b, b-c):

a-b:

b-c:

c-d:

d-e:

e-f:

e.     Describe how the motion of the particles changes for each segment of the graph (i.e. a-b, b-c):

a-b:

b-c:

c-d:

d-e:

e-f:

f.     Draw energy bar charts (“L” of LOL) on the graph for each particle diagram to represent changes in E k
and EI.
g.   Draw LOL energy transfer diagrams (“O” of LOL) at the bottom of the graph to show how the energy of
the system is changing for each segment of the graph

h. Label the freezing point, melting point, condensation point, and boiling point on the graph.

i.   If you had a larger sample of the same substance, what would you predict the graph to look like? Draw a
rough sketch sample to support your explanation.

j.   If the graph would start at 40 oC, what would the graph look like? How would it change? EXPLAIN.
Draw a rough sketch sample below to support your explanation.

k.   If you were to move up in elevation, what would change about your graph? EXPLAIN. Draw a rough
sketch sample below to support your explanation.

```
DOCUMENT INFO
Shared By:
Categories:
Stats:
 views: 737 posted: 4/23/2009 language: English pages: 2
How are you planning on using Docstoc?