L07 Chem 151 Lecture 10: Spring Experiment 1 Lecture
31 Jan 2017
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This holds true for most gases when t and p are far from liquefying t and p, because they behave very close to ideal behavior. Ptot = pa + pb = (na + nb)rt/v. F = mg = hag (density * volume ha) Note: h has to be measured in meters and has to be measured in kg/m3. Water will flow from higher side to lower side. To make pflask = patm, set h = 0. 2kclo3 -----heat + mno2-- 2kcl + 3o2 n = moles o2produced = mass difference/molar mass o2. T = temp o2 after apparatus has cooled down. V = vo2 after apparatus has cooled down = volume of water displaced. P = po2 = pressure o2 at t, pflask = patm (equalize liquid levels) So: po2 = patm (+/- . 1 torr) ph2o. Relative error in r = rel. error in p + rel. error in v + rel. error in n + rel. error in t.
