Melting Regularities & the CRC

Melting Regularities
& the CRC Worksheet

The CRC Handbook is a valuable source of information. This is an introductory exercise designed to familiarize you with some of the tables you'll be using this year.

Find the melting points of the following substances from the Inorganic Compounds table: titanium, sodium chloride, carbon dioxide, and water.
Find the chemical formulas & the melting points of the following substances from the Organic Compounds table: butane, methane, octane, and propane. What regularities or patterns can you find between these compounds' formulas and their melting points?
Find the table for the melting points of waxes (it may be combined with information on oils). Record the names and melting points of two substances with relatively high melting points and two substances with relatively low melting points. Why are the mp listed as ranges instead of a single numbers?

A
The work exceeds the "B" standard given below in the sophistication of the answers to questions #2-3.

B
The work demonstrates that the student can find the appropriate table in the CRC, can find patterns in data, and understands the significance of fixed melting points. The work is clearly written and labeled. There may be minor flaws in identification of mp/formulas or in answers to questions or in written presentation.

C
The work demonstrates mastery of 3 of the 4 areas listed above (using the CRC, finding patterns, understanding mp, and presentation), but shows a significant lack of mastery of one area.

D
The work demonstrates some quality, but does not provide evidence of mastery of at least one of the four points shown in "B" above.

F
The work demonstrates little or no understanding of the task.

A	The work exceeds the "B" standard given below in the sophistication of the answers to questions #2-3.
B	The work demonstrates that the student can find the appropriate table in the CRC, can find patterns in data, and understands the significance of fixed melting points. The work is clearly written and labeled. There may be minor flaws in identification of mp/formulas or in answers to questions or in written presentation.
C	The work demonstrates mastery of 3 of the 4 areas listed above (using the CRC, finding patterns, understanding mp, and presentation), but shows a significant lack of mastery of one area.
D	The work demonstrates some quality, but does not provide evidence of mastery of at least one of the four points shown in "B" above.
F	The work demonstrates little or no understanding of the task.