Chemistry: The Study of Change
- Of the three temperature scales used today, the Kelvin scale is the one
most often used in chemistry problems. The website at http://www.math.csusb.edu/history/public_html/Mathematicians/Thomson.html
gives a brief overview of the life of William Thomson (aka Lord Kelvin). Read
through his history and answer the following:
- What was Kelvin's absolute scale based on, and when was it introduced?
- The absolute temperature scale derives its name from Thomson's title.
What was his full title (in 1892)?
- In what year was he knighted, and for what specific work was this honor
bestowed upon him?
Now, go http://www.infoplease.com/ipa/A0001731.html.
- Find the definition of absolute zero, and write down the corresponding
Celsius and Fahrenheit temperatures.
- The website, "Nitrogen: Food or Flames", at http://www.cems.umn.edu/~aiche_ug/history/h_s_n2.html
presents a lot of information about the element nitrogen and some of the common
compounds it forms.
- Name three compounds from this site that contain nitrogen, and tell
what each compound is responsible for in our every day lives.
- Plants play two very important roles in the nitrogen cycle. What are
- Give the name of a compound containing nitrogen that is used as the
explosive charge in shells and bombs.
- Specific Gravity is the ratio of the mass of a substance to the mass of
an equal volume of distilled water at 4°C. It is a unitless quantity. Since
the mass of one mL of water at 4°C is exactly 1 g, the specific gravity (unitless)
is numerically equivalent to its density (in grams per mL).
Now, go to http://chemfinder.camsoft.com/.
Type in carbon tetrachloride as the name of the compound to be found and submit
- Convert the melting point given to degrees Fahrenheit.
- Convert the boiling point given to degrees Kelvin.
- A sample of carbon tetrachloride weighs 15 g. What volume does it occupy