Identifier: studyofcalorimet00kofo (find matches)
Title: A study of calorimetric methods together with a critical study of the peroxide calorimeter
Year: 1902 (1900s)
Authors: Kofoid, Reuben Nelson
Subjects: Calorimetry Calorimeters Peroxides Theses
Publisher:
Contributing Library: University of Illinois Urbana-Champaign
Digitizing Sponsor: University of Illinois Urbana-Champaign

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nt ofthe deconpocition effected by heat. I. Total SO3 in KSO^ 59.35GO3 available 29.62$ 0 available 5.92io KgSO^ 64.44 II. b ^ Loss in T/oi^:ht on hoatg to 200 deg. 5.94 5.20 ^ SO5 in residue 50.13 58.04 5b SO-3 lost on heating 1.22 1.31 io 0 lost on heating 4.72 3.89 Hence fron th.ese figures^the st,.iges of decoiaposition, though r^otsliarply separated as to SO,^ and 0 seen to be fairly co^istant,especially the SO3. The oxyrien is the nost variable, but fromits iiaturc, it co/not introduce a large error. The v-iriatio?*- ofthe oxygen ^.ras proved by a-TOt.ior .icthod, as follovrs. Sec drav/ing,A Kipp e-!ieratcr v/as filled vith narble, pjid the ssxiplc v;as plac-in a 15cc. distilliiig flask, the nccl: of ivhich r/as con^ected tothe generator. Tii^ ...olivei-y tube of the flash was connecter toa pneunatic trough filled v/ith a strong solution of caustic pot-ash. The gcr.erator was turned on and the air in the system dis-placed^by CO3. A cudioiaeter tyas then placed over the end of
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h< q: t 0 ui r :d-Jo> 2 UJ x 0 k u 0 -22- the delivery ^:uuo and the nercury oat)i containing the flask rrasheateu un;.il ..ccouposition took place. The -;aseG, 0 and SCv cain^^off si:.iulto,neously, and the lat:er together \7ith the CO2 was as-soroed oy the ICOil solution. YH^.cn the reaction v;ac over, the heat•?7as \7ithdrav/n, and flask -^Tashed ont Tiith the COo. The 0 of coiirsTzas not ahsoroed. After staiiding in the cooling jar until con-stant, the voliu;:C- -as read off* ^he determination r/as duplicatedseveral tiuCB, The fjjnount of C given off T.as quite varial^le as nay he seen froi-i the table ■bclov/. Amount of sample l.OGGu £:^ri.i l.OOOC cc. of oxygen 46.7 cc 5£.l 46.1 The a0U2it of oxygen tvas detemincd in another xjoi/- hesides, by t;ieuse of Schiffp nitroiaetcr. (Lee drav/in^) The tube containin the sai:-ple /as co .-:iocto -^.r the nitror.eter as the cartridf:je is inthe drawing. It ■.yas heated to decomposition

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