Enthalpies of reaction of tris(hydroxymethyl)aminomethane in HCl(aq) and in NaOH(aq)

Prosen, E.J.; Kilday, Marthada V.

doi:10.6028/jres.077a.034

Cited by 97 publications

(36 citation statements)

References 6 publications

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“…Results were obtained in this system using various calorimetric procedures in co mmon use at high and low stirring rates. These results are compared with those obtained In a platinum-lined silver, vacuum-jacketed, adiabatic solution calorimeter [6,7,9] for which it has been demonstrated [9] that negligible corrections for heat transfer with the environment are required .…”

mentioning

confidence: 98%

“…The corrected aT was calculated by Nuttall's method of calculation described previously [8]. The system for measuring electrical energy was also described [8] and the calculations were similar to those given in [7]. The 1975 with the adiabatic calorimeter [6] and for the e nthalpy of solution value recommended by the P hysical Che rn istry Division of IUPAC [12].…”

Section: Materials Apparatus and Proceduresmentioning

confidence: 99%

“…The correcti on to T=298.15 K, Co rrS T' uses I:l.C,,= -0.1548 kj·mor'.K-' for KCI [6] and 0.1738 kj·mor' ·K-' for TRIS [7] The Reaction Period is the elapsed time between initiating the reaction (or electrical heating) and the beginning of the final rating period.…”

Section: Materials Apparatus and Proceduresmentioning

confidence: 99%

“…Therefore, if the recommended procedures are followed, the sources of error identified here should be minimized; this can be confirmed by measurements of a standard reference reaction [6,7,9,10].…”

mentioning

confidence: 99%

“…The standard reference reactions used in this work are (1) the solution of NBS Standard Reference Material (SRM) 1655 2 , KCI, in H 2 0 [6], and (2) the solution of SRM 724a 2a , tris(h ydroxymethyl)aminomethane (TRIS), in 0.1 mol·dm-a Hel soluti~n [7]. The first reacti on is endothermic and the second is exothermic.…”

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confidence: 99%

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Systematic errors in an isoperibol solution calorimeter measured with standard reference reactions

Kilday¹

1980

J. RES. NATL. BUR. STAN.

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Syste mati c erro rs in an isope ribol calorimete r of a wid e ly.used design, amou nting to a bout 0.5 pe rce nt of the e nd othermi c enthalpy of solu tion of S RM 1 655 (KCI) in H20 , were fou nd to be th e res ult of e rro rs in hea t leak co rrections due to in adeq uate s tirring and comm onl y used calo rimetric procedures.Other systematic e rrors we re found in meas urements of the enthalpy of soluti o n of the exothermic reaction of tri s(hydroxymethyl)aminomethan e in aq ueou s HCI so lution.Recom mended procedures are summarized.Key words: Calorime try; enth alpy of so luti on; KCI ; so luti on calo rim etry; standard re ference materials; the rmochemistry; tris(h ydroxymeth yl)amin omethane.

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confidence: 98%

Section: Materials Apparatus and Proceduresmentioning

confidence: 99%

Section: Materials Apparatus and Proceduresmentioning

confidence: 99%

mentioning

confidence: 99%

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confidence: 99%

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Systematic errors in an isoperibol solution calorimeter measured with standard reference reactions

Kilday¹

1980

J. RES. NATL. BUR. STAN.

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Semiadiabatic (Isoperibol) Solution Calorimetry

Vargas

2012

Characterization of Materials

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The semi‐adiabatic (isoperibol) solution calorimetry is a versatile calorimetric technique with a broad field of applications. The principles of the method and the common designs of the calorimeters are described. The Regnault–Pfaundler and Dickinson methods for determination of temperature change of the reaction/solution or the calibration are also described. Finally, applications of the semi‐adiabatic solution calorimetry are mentioned.

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Calorimetric studies of the interactions of guanidinium hydrochloride and potassium iodide with model amides in aqueous solution

Stimson

Schrier

1975

Biopolymers

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SynopsisThe enthalpies of t.ransfer, AH,,, of a series of amides from water to aqueous solutions of either guanidinium hydrochloride (GiiIICI) or potassium iodide were obtained from calorimet,ric measurements at 25°C. The amides were st.udied at molalities around 1 0 4 m while salt molalities ranged from 0-10 m. The amides investigabed were Ac-Gly-NHMe, Ac-Gly-Gly-NHNe, Ac-Ala-NIIlle, and Ac-Len-NIIAle. Use of an additivit,y assumption allowed the calcrilation of group cont.ribut.ions to A H , , in these two salt systems for the methyl grorip, leucyl side rhain, and the peptide backbone unit,. Valiies of the entropy of transfer were also obtained. The great ability of (;uIICI to randomize prot.ein structures appears to arise from effects on polar and nonpolar groups, which are characterized by enthalpies and entropies of transfer riot, substantially different. from those wit.h KI, a salt comprised of ions of comparable size and polarizability. The difference in the sign of the free energies of transfer of nonpolar groups from water to l I S solutions, negative for GuHCI and positive for KI, is t.he result of t.hese rniall diflerences in enthalpies and entropies of transfer. Variations in water striicture produced by differences in ionic propert.ies rather than a mode of action for GiiHCI very different from that of ot.her salts characterizes its superior denaturing ability. 509

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Enthalpies of reaction of tris(hydroxymethyl)aminomethane in HCl(aq) and in NaOH(aq)

Cited by 97 publications

References 6 publications

Systematic errors in an isoperibol solution calorimeter measured with standard reference reactions

Systematic errors in an isoperibol solution calorimeter measured with standard reference reactions

Semiadiabatic (Isoperibol) Solution Calorimetry

Calorimetric studies of the interactions of guanidinium hydrochloride and potassium iodide with model amides in aqueous solution

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