I'm not really sure were to get started on this problem...
The most reliable measure of intoxication is a direct measurement of blood alcohol (ethanol or EtOH) concentration, but this test cannot be conducted in the field. In most cases, the results of a "breathalyzer" test administered properly by a police officer on the site are admissible in court. The breathalyzer test depends on the proportionality of breath concentration of alcohol, Cbr, to the concentration of alcohol in the blood. This concentration in the breath, Cbr, is measured in mole/liter (M) by the breathalyzer. To obtain the estimated blood alcohol concentration, Cbl, the measured concentration in M of the breath alcohol is multiplied by the "breathalyzer correlation factor" of 2100. That is, Cbl = 2100 times Cbr. It is assumed that the ethanol is transferred to the lungs at 34 degree C in the calculation. Cbl is also related to the partial pressure of ethanol in breath (Pbr, expressed in atm) by Henry's law in which the constant kbl has units of M/atm. Cbl = kbl Pbr As a forensic chemist, you have developed a new, fast, and reliable technique for breath analysis that measures the partial pressure of ethanol in breath, Pbr. This is different than the molar concentration, Cbr, that is obtained from the breathalyzer test, but related to that quantity. In order to use your new method, you must convert the standard correlation factor of 2100 used in the breathalyzer test to the Henry's law constant, kbl, for blood at 34 degree C.
