1951
DOI: 10.6028/jres.046.052
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Heat of combustion and formation of cyanogen

Abstract: Calorimetric measureme nts weTe made of the heat of combustio n of cyanogen in oxygen in a flame at consta nt press ure. The data y ielded the following value for the reaction of combu stion: C2N 2 (gas) + 202 (gas)= 2C02 (gas)+N2 (gas), !1FIc o at 25° C= -1095.97 ± 1.80 kj /mole = -261.94 ± 0.43 kcal/mole. Utili zing t he value for t he h eat of formation of carbon dioxide, the following value is given for the reaction of formation : 2C (solid, g raphi te) +~2 (gas) =C2X2 (gas) , MljO at 25° C=308.94 ± 1.80 k… Show more

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Cited by 10 publications
(3 citation statements)
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“…The experimental heat of formation for cyanogen (73.3 ± 0.2 kcal/mol) was taken from the book of Pedley et al and cross-checked with the extensive evaluation of Cioslowski et al, the monograph of Lias et al, and the compilation of the G2/97 data set, all of which cite the Pedley value. Closer inspection reveals, however, that Pedley et al have preferred an older value based on a smaller quoted error bar, discarding the redetermination (73.8 ± 0.4 kcal/mol) reported by Knowlton and Prosen . The more recent value and its associated uncertainty provide better support of the high-level theoretical data discussed above.…”
Section: Results: Heats Of Formationmentioning
confidence: 88%
See 1 more Smart Citation
“…The experimental heat of formation for cyanogen (73.3 ± 0.2 kcal/mol) was taken from the book of Pedley et al and cross-checked with the extensive evaluation of Cioslowski et al, the monograph of Lias et al, and the compilation of the G2/97 data set, all of which cite the Pedley value. Closer inspection reveals, however, that Pedley et al have preferred an older value based on a smaller quoted error bar, discarding the redetermination (73.8 ± 0.4 kcal/mol) reported by Knowlton and Prosen . The more recent value and its associated uncertainty provide better support of the high-level theoretical data discussed above.…”
Section: Results: Heats Of Formationmentioning
confidence: 88%
“…Closer inspection reveals, however, that Pedley et al have preferred an older value 138 based on a smaller quoted error bar, discarding the redetermination (73.8 ( 0.4 kcal/mol) reported by Knowlton and Prosen. 139 The more recent value and its associated uncertainty provide better support of the high-level theoretical data discussed above.…”
Section: Cyanogenmentioning
confidence: 75%
“…(16) are those which refer to heats of formation of the various compounds from their elements in their standard states at 25" C. (16) are those which refer to heats of formation of the various compounds from their elements in their standard states at 25" C.…”
Section: (9)mentioning
confidence: 99%