Heats of combustion of liquid n-hexadecane, 1-hexadecene, n-decylbenzene, n-decylcyclohexane, n-decylcyclopentane, and the variation of heat of combustion with chain length

Abstract

The heats of combust ion of five h ighl y purified long-chai n liquid h.vdrocil.rbon~ "'ere meas ured ",ith a bomb ca lorimeter . The calor imetric data y ield t he folloll'ing \'a lues for the h eat~ of combu s tiOIl , -t1 f1 cO(25° e), of the li quid hydrocarbon wilh gaseo us Ox.'·gE' 1l t o form gaseous car bon dioxide and liqu id water ; .l k ii ocalorie = 4.1840 kilo jo ul e. It i~ sholl' n th a, t , in th e liquid as \\'('11 as in the gascous s tat e, t he inc rc mc nt in the h(' a t of co mbu s ti o n (a nd hence in the heat of for matio n) prr (' H , group added in the li-alk.\·1 sid e chain is a co ns ta.nt excepL fo r the fi rst (\\'0 l1l e mben' of the . 'ie r ie s, and th a t (his incre me nt ha~ lh(' same value for eac h o f (hese s('r ies of com p ounds.

Thermochemical study of two -benzoyl- , -dialkylureas

“…a value in agreement with that of Fraser and Prosen (11) for a sample of mass fraction purity of 0.9996, − c u o (l) = (47155.0 ± 3.8) J · g −1 . Samples in pellet form were ignited at T = (298.150 ± 0.001) K in oxygen at a pressure of 3.04 MPa with a volume of 1 cm 3 of water added to the bomb.…”

Enthalpies of combustion of 2-iodosobenzoic acid and 4-nitrosophenol: the dissociation enthalpy of the I–O bond

“…(23) Hexadecane (Aldrich Gold Label, mass fraction w > 0.99) stored under nitrogen was used as an auxiliary combustion aid in measurements. The standard massic energy of combustion of the hexadecane was measured, − c u o (l) = (47145.8 ± 1.3) J · g −1 , and it is in good agreement with the value of Fraser and Prosen (24) for a sample with w = 0.9996,…”

Energetic studies of urea derivatives: Standard molar enthalpy of formation of 3,4,4′-trichlorocarbanilide

“…The following standard massic energy of combustion values of the combustion auxiliaries used are as follows: for ÀD c u =ðhexadecane;lÞ ¼ ð47156:9 AE 3:3Þ J Á g À1 , which is in agreement with the value of Fraser and Prosen [32] for a sample of mass fraction 0.9996, ÀD c u ðlÞ ¼ ð47155:0 AE 3:8Þ J Á g À1 and for ÀD c u ðMelinexÞ ¼ 22; 902 AE 5 J Á g À1 , determined by Skinner and Snelson [24]. This last value was confirmed by combustion of Melinex samples in our laboratory.…”