CHEM 197B Supplemental Instruction Differentiating Characteristics: Phase Behavi

Question

CHEM 197B Supplemental Instruction Differentiating Characteristics: Phase Behavion Homework 2 The inhalation anesthetics used in modern medicine are halogenated ethers, which are carbon- based compounds containing at least one C-o-C group and different halogen atoms (e.g,, F, Cl). The vapor pressure curves for several of these substances are shown in the graph: 1600 1400 1200 1. Most medical vaporizers are kept at a constant temperature close to 20 °C and 1 atm (760 mm Hg). What is the stable phase of the anesthetics shown in the graph under these conditions? a) Gas c) Solid 1000 b) Liquid d) Supercritical fluid 800 6001 400 200 0510 15 20 25 30 35 40 45 50 55 60 65 Temperature ( C 2. Which of the substances represented in the graph will be a gas at body temperature (37 °C) and 1 atm: a) c) lsoflurane soflurane, Halothane, Enflurane, Sevoflurande b) Desflurane d) None of them 3. Denver, the 'mile high city, has an atmospheric pressure of around 0.82 atm. At what ha eamss temperatures will both Desflurane and Isoflurane pyict in t

Explanation / Answer

Ans 1 : All the molecule willbe in liquid state because the at 20 degree the vapour pressure for all the molecules is less than 760mmHg. threfeore they will be in liquid state.

2. The desflurane will be in gas state because at 37 degree this molecule has vapure pressure more that the normal 1 atm (760 mmHg) pressure.

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