Reaction of the hydrated electron with water

Journal Article · Thu Oct 29 04:00:00 EST 1992 · Journal of Physical Chemistry

DOI:https://doi.org/10.1021/j100201a044· OSTI ID:458815

Schwarz, H A ^[1]

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1. Brookhaven National Lab., Upton, NY (United States)

The reaction of e{sup {minus}}{sub (aq)} with water was studied as a function of temperature in hydrogen-saturated water and in deaerated formate solutions. The two system gave similar results. The rate constant at 25 {degrees}C is 1040 s{sup {minus}1}, and the activation energy is 7.5 {plus_minus} 0.2 kcal/mol. This activation energy and a recent determination of the activation energy for the reverse process give {Delta}H{degrees}{sub 298} = {minus}1.4 {plus_minus} 0.2 kcal/mol for the reaction e{sup {minus}}{sub aq} + H{sub 2}O{sub liq} {r_reversible} H{sup {sm_bullet}} + OH{sup {minus}}, to be compared with an earlier value of {minus}1.1 kcal/mol derived from the equilibrium of e{sup {minus}}{sub (aq)} with NH{sub 4}{sup +}. The earlier value is believed to be less susceptible to errors. 22 refs., 2 figs., 3 tabs.

• Research Organization: Brookhaven National Laboratory (BNL), Upton, NY
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 458815
• Journal Information: Journal of Physical Chemistry, Journal Name: Journal of Physical Chemistry Journal Issue: 22 Vol. 96; ISSN JPCHAX; ISSN 0022-3654
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
AMMONIA
CHEMICAL REACTIONS
ELECTRON ATTACHMENT
ELECTRON CAPTURE
FORMATION HEAT
TEMPERATURE DEPENDENCE
WATER