CHEM 106 Lecture Notes - Lecture 2: Kelvin, Intensive And Extensive Properties, Celsius

• School: SIU
• Department: Chemistry And Biochemistry
• Course: CHEM 106
• Professor: M I C H A E L J.L Y D Y

Document Summary

1-3: measuring always involves estimation (last digit is estimated, no measuring device is perfect. International system of units (si units): based on the metric system which has multiples by 10, metric system is used worldwide by everyday people and specially scientists. Other si units that are not official include: volume liter (m3, pascals pressure. Other derived units include: molar mass (mm) kg/mol = mass/moles, molar volume (vm) m3/mol = volume/moles, energy (e) joule (j) = force*l. The metric system: metric quantities can be made bigger or smaller by the amount of prefixes. Metric equalities: when comparing and converting between units with the same base unit, using equalities can relate the units, the units are based on the metric prefixes and can be interchangeable. 2: coldest temperature possible, theoretically, average temperature of universe is 2. 73 k (= -270. 4 c, at temperatures near absolute zero solids have unique characteristics including superconductivity ( meaning no electrical resistance)