Measurement of Decreasing Temperatures of Ethyl and Isopropyl Alcohol

Measurement of decreasing temperatures of Ethyl and Isopropyl alcohol

Purpose:

An experiment to compare the dropping temperatures of Ethyl and Isopropyl.

Background information:

Ethanol, also called ethyl alcohol, pure alcohol, grain alcohol, or drinking alcohol, is a volatile, flammable, colorless liquid with the structural formula CH3CH2OH, often abbreviated as C2H5OH or C2H6O.

Isopropyl alcohol is a common name for a chemical compound with the molecular formula C3H8O or C3H7OH. It is a colorless, flammable chemical compound with a strong odor. Unlike ethanol, isopropyl alcohol can be separated from aqueous solutions (a solution in which the solvent is water.) by adding an inorganic salt.

Hypothesis:

If you were to measure the temperatures of alcohol (Ethyl and Isopropyl) over 30 second intervals then the temperature will decrease because alcohol evaporates.

Materials:

* Cotton ball

* Rubber band x2

* Ring stand

* Utility clamp

* Thermometer x2

* Timer

* 1mL Pipette x2

* 10mL Granulated cylinder x2

* 50mL Beaker x2

* 10mL Ethyl Alcohol

* 10mL Isopropyl Alcohol

* Label Tape

Safety:

Must wear goggles, lab apron, and appropriate clothing (no baggy sleeves or open toed shoes, legs must be completely covered, and hair must be pulled back)

Will ignite below 100 ◦F or 37.7778 ◦C Ignite below 100 ◦F or 37.7778 ◦C

Ethyl is stable Isopropyl is stable

No special Hazard No Special Hazard

Hazardous Slightly Hazardous...