CHEM 2121 Chapter Notes - Chapter 0: Plastics Industry, Pressure Measurement, Calcite
Document Summary
The analytical process: last century, humans greatly changed earth"s atmosphere composition, charles david keeling measured atmospheric co2 quantitative chemical analysis/analytical process. Hemisphere: co2 = near 310 ppm in free atmosphere over large regions of northern, by 1956, findings = firm enough to share, esp to dr. oliver wulf of u. s. Bureau, working @ caltech: ow passed cdk"s results to harry wexler, head of meteorological research @ weather. Atmospheric co2 measurements = reproducible to 0. 1 ppm: now, doubtful how much that precision needed b/c existing literature claims air. Gov tried to find other substitutes, but they"re not as precise: cdk"s analytical quality subtle trends (ex: el ni o"s effect on ocean t) found out of overriding pattern of co2 and seasonal oscillations. Need different measurement strategy need to know avg mass of chocolate and avg mass of nuts in many candies need to know avg caffeine content of chocolate and nut.
